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OEM HARD DISK DRIVE SPECIFICATIONS for DCAS-34330 / DCAS-32160 SCSI-3 FAST-20 50/68/80-pin 3.5-Inch Hard Disk Drive ( 4330 / 2160 MB ) Revision (1.2) S73H-7993-03

6.3.3 80-PinModel ...............................................35 6.4 Environment ..................................................36 6.5 DC Power Requirements

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  • IBML

    OEM HARD DISK DRIVE SPECIFICATIONS for

    DCAS-34330 / DCAS-32160

    SCSI-3 FAST-20 50/68/80-pin

    3.5-Inch Hard Disk Drive ( 4330 / 2160 MB )

    Revision (1.2)

    S73H-7993-03

  • IBML

    OEM HARD DISK DRIVE SPECIFICATIONS for

    DCAS-34330 / DCAS-32160

    SCSI-3 FAST-20 50/68/80-pin

    3.5-Inch Hard Disk Drive ( 4330 / 2160 MB )

    Revision (1.2)

    S73H-7993-03

  • 1st Edition (Rev.0.1) S73H-7993-00 (Aug. 30, 1996) Preliminary2nd Edition (Rev.1.0) S73H-7993-01 (Sep. 26, 1996)3rd Edition (Rev.1.1) S73H-7993-02 (Oct. 29, 1996)4th Edition (Rev.1.2) S73H-7993-03 (Dec. 18, 1996)

    The following paragraph does not apply to the United Kingdom or any country where such provisions areinconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THISPUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY ORFITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer or express or implied warrantiesin certain transactions, therefore, this statement may not apply to You.

    This publication could include technical inaccuracies or typographical errors. Changes are periodically made to theinformation herein; these changes will be incorporated in new editions of the publication. IBM may make improve-ments and/or changes in the product(s) and/or the program(s) described in this publication at any time.

    It is possible that this publication may contain reference to, or information about, IBM products (machines andprograms), programming, or services that are not announced in your country. Such references or information mustnot be construed to mean that IBM intends to announce such IBM products, programming, or services in yourcountry.

    Technical information about this product is available from your local IBM representative or at http://www.ibm.com/harddrive

    IBM may have patents or pending patent applications covering subject matter in this document. The furnishingof this document does not give you any license to these patents. You can send license inquiries, in writing, to theIBM Director of Commercial Relations, IBM Corporation, Armonk, NY 10577.

    Copyright International Business Machines Corporation 1996. All rights reserved.Note to U.S. Government Users —Documentation related to restricted rights —Use, duplication or disclosure issubject to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

  • Contents

    1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.2 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.3 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.4 GeneralCaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

    1.0 Outline of the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

    Part 1. Functional Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

    2.0 Fixed Disk Subsystem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 ControlElectronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72.2 HeadDisk Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72.3 Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

    3.0 Drive Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.1 FormattedCapacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.2 DataSheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.3 Cylinder Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103.4 PerformanceCharacteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

    3.4.1 Commandoverhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.4.2 Mechanical Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113.4.3 Drive Ready Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.4.4 Data Transfer Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133.4.5 BufferingOperation (Lookahead/Write Cache) . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.4.6 Throughput . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.4.7 OperatingMode Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

    4.0 Data integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174.1 Equipment Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174.2 ErrorRecovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

    5.0 Physical Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.1 Shipped Format (PList) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195.2 ReassignedFormat(GList) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

    6.0 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1 Electrical Interface Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

    6.1.1 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216.1.2 SCSI Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.3 SCSI Bus Terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.4 Hot Plug /Unplug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246.1.5 SCSI BusElectrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256.1.6 Auxiliary Connector on68-pin Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

    6.2 Option JumperBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276.2.1 JumperSignalDescription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296.2.2 ShippingDefault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

    6.3 LED Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336.3.1 50-PinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336.3.2 68-PinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

    Copyright IBM Corp. 1996 iii

  • 6.3.3 80-PinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356.4 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366.5 DC Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

    6.5.1 Start Up Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386.6 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

    6.6.1 ContactStart Stop (CSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.2 Data Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.3 Seek/ID Mis-compare Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.4 Equipment Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.5 Failure Prediction ( PFA /S.M.A.R.T.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 396.6.6 Automatic Drive Maintenance(ADM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406.6.7 PreventiveMaintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

    6.7 MechanicalSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416.7.1 Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416.7.2 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 446.7.3 InterfaceConnector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456.7.4 Mounting Positions and Tappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486.7.5 ShippingZone and Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496.7.6 Breather Hole . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

    6.8 Vibration and Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.1 Operating Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.2 Non-OperatingVibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506.8.3 Operating Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516.8.4 Non-Operating Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

    6.9 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .526.9.1 Sound PowerLevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.9.2 Sound PowerAcceptance Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 526.9.3 Sound Pressure (Reference). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

    6.10 Identification Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546.11 Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 546.12 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

    6.12.1 Underwriters Lab(UL) Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.2 Canadian Standards Authority (CSA) Approval. . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.3 IECCompliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.4 GermanSafety Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.5 Flammability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556.12.6 Secondary CircuitProtection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

    6.13 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

    Part 2. SCSI Interface Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

    7.0 SCSICOMMAND SET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597.1 Flag and LinkBits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 607.2 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.3 Byte ordering conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617.4 FORMAT UNIT (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

    7.4.1 Defect List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 627.4.2 Defect Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

    7.5 INQUIRY (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667.6 Inquiry data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

    7.6.1 INQUIRY Data Format (WhenInvalid LUN is Specified) . . . . . . . . . . . . . . . . . . . . 687.6.2 Inquiry Data Format -EVPD = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 707.6.3 Inquiry Data Format -EVPD = 1 - PageCode = 00 . . . . . . . . . . . . . . . . . . . . . . . 727.6.4 Inquiry Data Format -EVPD = 1 - PageCode = 01 . . . . . . . . . . . . . . . . . . . . . . . 73

    iv OEM Spec. ofDCAS-34330/32160

  • 7.6.5 Inquiry Data Format -EVPD = 1 - PageCode = 03 . . . . . . . . . . . . . . . . . . . . . . . 747.6.6 Inquiry Data Format -EVPD = 1 - PageCode = 80h . . . . . . . . . . . . . . . . . . . . . . 757.6.7 Inquiry Data Format -EVPD = 1 - PageCode = 82h . . . . . . . . . . . . . . . . . . . . . . 76

    7.7 LOG SELECT(4C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 787.8 LOG SENSE(4D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

    7.8.1 LogPage parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 807.8.2 Log SensePage 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 817.8.3 Log SensePage 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 827.8.4 Log SensePage 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 847.8.5 Log SensePage 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 867.8.6 Log SensePage 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 887.8.7 Log SensePage 3A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

    7.9 MODE SENSE(1A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 907.9.2 Mode ParameterList . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

    7.10 MODE SENSE(5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 947.11 MODE SELECT (15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 957.12 Mode select data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

    7.12.1 Page 0 (VendorUnique Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 987.12.2 Page 1(Read/Write ErrorRecovery Parameters). . . . . . . . . . . . . . . . . . . . . . . . . . 1017.12.3 Page 2(Disconnect/Reconnect Parameters). . . . . . . . . . . . . . . . . . . . . . . . . . . . .1067.12.4 Page 3(FormatDeviceParameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1087.12.5 Page 4 (Rigid Disk DriveGeometryParameters) . . . . . . . . . . . . . . . . . . . . . . . . . . 1107.12.6 Page 7(Verify Error Recovery Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1117.12.7 Page 8 (Caching Parameters). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1137.12.8 Page A(Control Mode Page Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1157.12.9 Page 0C(Notch Parameters) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1177.12.10 Page 1C (Informational ExceptionsControl) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1197.12.11 Page 38(Power Control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

    7.13 MODE SELECT (55) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1227.14 PRE-FETCH (34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1237.15 READ (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1247.16 READ CAPACITY (25) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1257.17 READ DEFECTDATA (37) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

    7.17.1 Defect ListHeader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1287.17.2 Bytes from Index Format(100b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1287.17.3 Physical Sector Format (101b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

    7.18 READ EXTENDED (28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1307.19 READ BUFFER(3C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

    7.19.1 CombinedHeader AndData (Mode000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1317.19.2 Read Data (Mode010b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1327.19.3 Descriptor(Mode 011b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

    7.20 READ LONG(3E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1347.21 REASSIGN BLOCKS(07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1357.22 RECEIVE DIAGNOSTICS(1C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

    7.22.1 ReceiveDiagnostic Page 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1377.22.2 ReceiveDiagnostic Page 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

    7.23 RELEASE (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1397.24 REQUESTSENSE (03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1407.25 RESERVE (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1417.26 REZERO UNIT (01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1427.27 SEEK(0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1437.28 SEEKEXTENDED (2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1447.29 SEND DIAGNOSTIC(1D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145

    7.29.1 Send Diagnostic Pages 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1467.29.2 Send Diagnostic Pages 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

    Contents v

  • 7.30 START/STOPUNIT (1B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1487.31 SYNCHRONIZE CACHE(35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1497.32 TESTUNIT READY (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1507.33 VERIFY (2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1517.34 WRITE (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1527.35 WRITE EXTENDED(2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1537.36 WRITE AND VERIFY (2E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1547.37 WRITE BUFFER (3B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155

    7.37.1 CombinedHeader AndData (Mode000b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1557.37.2 Write Data (Mode010b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1567.37.3 DownloadMicrocode (Mode 100b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1567.37.4 DownloadMicrocode andSave (Mode 101b) . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

    7.38 WRITE LONG(3F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1607.39 WRITE SAME (41) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161

    8.0 SCSIStatus Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163

    9.0 SCSI MESSAGE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1659.1 Supported Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

    9.1.1 COMMAND COMPLETE (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1669.1.2 SYNCHRONOUS DATA TRANSFER REQUEST(01,03,01H) . . . . . . . . . . . . . . . . 1669.1.3 WIDE DATA TRANSFER REQUEST(01,02,03H) . . . . . . . . . . . . . . . . . . . . . . . 1689.1.4 SAVE DATA POINTER (02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1709.1.5 RESTORE POINTERS(03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1709.1.6 DISCONNECT (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1719.1.7 INITIATOR DETECTED ERROR (05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1719.1.8 ABORT (06) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1719.1.9 MESSAGEREJECT(07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1719.1.10 NOOPERATION (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.11 MESSAGEPARITY ERROR (09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.12 LINKED COMMAND COMPLETE (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.13 LINKED COMMAND COMPLETE WITH FLAG (0B) . . . . . . . . . . . . . . . . . . . . 1729.1.14 BUSDEVICE RESET (0C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.15 ABORT TAG (0D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.16 CLEAR QUEUE TAG (0E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1729.1.17 QUEUE TAG MESSAGES(20h,21h, 22h) . . . . . . . . . . . . . . . . . . . . . . . . . . . .1739.1.18 IGNORE WIDERESIDUE (23h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1739.1.19 IDENTIFY (80 - FF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174

    9.2 SupportedMessageFunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1749.3 Attention Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1769.4 SCSI Bus Related Error HandlingProtocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176

    9.4.1 Unexpected BUSFREE Phase Error Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . 1779.4.2 MESSAGE OUTPhase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1779.4.3 MESSAGE IN Phase Parity Error (Message Parity Error). . . . . . . . . . . . . . . . . . . . . 1779.4.4 COMMAND Phase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1779.4.5 DATA OUT Phase Parity Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1789.4.6 INITIATOR DETECTED ERROR Message . . . . . . . . . . . . . . . . . . . . . . . . . . . .1789.4.7 MESSAGEREJECTMessage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

    10.0 SCAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17910.1 SCAM operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

    10.1.1 Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17910.1.2 Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

    10.2 Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18110.3 Functioncodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

    vi OEM Spec. ofDCAS-34330/32160

  • 10.4 Action codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183

    11.0 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18511.1 SCSI Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185

    11.1.1 Priority of SCSI StatusByte Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18511.1.2 Invalid LUN in Identify Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18511.1.3 Incorrect InitiatorConnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18611.1.4 CommandProcessingDuring Execution ofActive I/O process . . . . . . . . . . . . . . . . . . 18611.1.5 Unit Attention Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18911.1.6 CommandProcessingDuring Start-up and Format Operations . . . . . . . . . . . . . . . . . 18911.1.7 Internal Error Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19011.1.8 Deferred error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19011.1.9 DegradedMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19111.1.10 Degradedmode handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19111.1.11 CommandProcessing While Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192

    11.2 Priority Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19311.3 Commandqueuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193

    11.3.1 Queue depth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19311.3.2 Taggedqueuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19411.3.3 Untagged queuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19411.3.4 Commandqueuingrule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19411.3.5 Queue Fullstatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19411.3.6 Devicebehaviour onCommandqueuing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

    11.4 Commandreordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19511.5 Concurrent I/OProcess . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19511.6 Back to Back Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19511.7 WriteCache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19511.8 PowerSavingMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19611.9 Automatic Rewrite/Reallocate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19611.10 Segmented Caching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

    11.10.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19811.10.2 ReadAhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

    11.11 Reselection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19811.12 SingleInitiator Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19811.13 Non-arbitratingsystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19811.14 Selectionwithout ATN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19911.15 Multiple Initiator Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

    11.15.1 Initiator SenseData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19911.15.2 Initiator Mode Select/ModeSenseParameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 19911.15.3 Initiator Data TransferMode Parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

    11.16 ContingentallegianceCondition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20011.17 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

    11.17.1 ResetSources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20111.17.2 Reset Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

    11.18 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20211.18.1 Power onDiagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20211.18.2 DiagnosticsCommand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20211.18.3 DiagnosticsFault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202

    11.19 Idle Time Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203

    12.0 SCSI SENSE DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20512.1 SCSISenseData Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20512.2 SenseData Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

    12.2.1 Valid(Bit 7 of byte 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20612.2.2 Error Code(Bit 6 - 0 of byte 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

    Contents vii

  • 12.2.3 ILI : Incorrect Length Indicator(Bit 5 of byte 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 20612.2.4 Sense Key(Bit 3 - 0 of byte 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20612.2.5 Information Bytes (Byte 3thru 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20712.2.6 Additional SenseLength (Byte 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20712.2.7 Reserved (Byte8-11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20712.2.8 Additional SenseCode/Qualifier (Byte 12 and 13) . . . . . . . . . . . . . . . . . . . . . . . . . 20812.2.9 FRU :Field Replaceable Unit (Byte 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21112.2.10 Sense KeySpecific (Byte 15 thru 17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21112.2.11 Reserved (Byte 18thru 19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21212.2.12 Venderuniqueerror information(Byte 20thru 23) . . . . . . . . . . . . . . . . . . . . . . . . 21312.2.13 Reserved (Byte 28thru 31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

    Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215

    viii OEM Spec. ofDCAS-34330/32160

  • Figures

    1. FormattedCapacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92. DataSheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93. CommandOverhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114. Mechanical Positioning Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115. Full StrokeSeekTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126. Cylinder Skew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127. HeadSkew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128. LatencyTime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129. Drive Ready Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

    10. DataTransfer Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1311. Simple SequentialAccessPerformance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1512. RandomAccessPerformance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1513. ModeTransition Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1614. Power Connector PinAssignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2115. Table ofSignals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2116. Table ofSignals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2217. Table ofSignals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2318. Logic Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2519. JumperPins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2720. Option JumperBlock Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2821. SCSIDevice ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2922. DisableAuto Spin Up ,Auto Start Delay & Delay Start . . . . . . . . . . . . . . . . . . . . . . . . 3123. LED Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3124. DefaultJumperSetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3225. LED Circuit of 50-PinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3326. LED Circuit of 68-PinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3427. LED Circuit of 80-Pin (SCA-2)Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3528. Environmental Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3629. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3730. Power Supply Current ofDCAS-34330 with SCSITerminator Enabled . . . . . . . . . . . . . . . 3731. Power Supply Current ofDCAS-32160 with SCSITerminator Enabled . . . . . . . . . . . . . . . 3732. Power Supply Generated Ripple atDrive Power Connector . . . . . . . . . . . . . . . . . . . . . . 3833. TypicalCurrentWaveForm of 12V atStart Up of DCAS-32160 . . . . . . . . . . . . . . . . . . . 3834. Outline of 50-pinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4135. Outline of 68-pinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4236. Outline of 80-pinModel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4337. PhysicalDimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4438. MechanicalDimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4439. InterfaceConnector(50-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4540. InterfaceConnector(68-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4641. InterfaceConnector(80-pin Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4742. MountingPositions and Tappings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4843. Breather HoleLocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4944. RandomVibration PSDProfile Breakpoints (Operating) . . . . . . . . . . . . . . . . . . . . . . . 5045. RandomVibration PSDProfile Breakpoints (Non-Operating) . . . . . . . . . . . . . . . . . . . . 5046. A-weightedSound PowerLevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5247. Sound PressureLevel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5348. SCSI Commands Supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5949. SCSI Commands Supported. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6050. FORMAT UNIT (04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6251. Format ofDefect ListHeader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

    Copyright IBM Corp. 1996 ix

  • 52. Defect Descriptor - Block Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6453. Defect Descriptor -BytesFrom Index Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6554. Defect Descriptor - Physical Sector Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6555. INQUIRY (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6656. INQUIRY DATA Invalid LUN Specified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6857. Product ID vs. FormattedCapacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6958. INQUIRY Data -EVPD = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7059. INQUIRY DATA - EVPD = 1 (PageCode = 00) . . . . . . . . . . . . . . . . . . . . . . . . . . 7260. INQUIRY DATA - EVPD = 1 (PageCode = 01) . . . . . . . . . . . . . . . . . . . . . . . . . . 7361. INQUIRY DATA - EVPD = 1 (PageCode = 03) . . . . . . . . . . . . . . . . . . . . . . . . . . 7462. INQUIRY DATA - EVPD = 1 (PageCode = 80h) . . . . . . . . . . . . . . . . . . . . . . . . . 7563. INQUIRY DATA - EVPD = 1 (PageCode = 82h) . . . . . . . . . . . . . . . . . . . . . . . . . 7664. LOG SELECT(4C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7865. LOG SENSE(4D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7966. MODE SENSE(1A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9067. PageCodeUsage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9168. Modeparameter header (6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9169. Modeparameter header (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9270. MODE ParameterBlock Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9271. MODE ParameterPage Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9372. MODE SENSE(5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9473. MODE SELECT (15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9574. PageCodeUsage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9775. Page 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9876. Page 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10177. Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10678. Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10879. Page 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11080. Page 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11181. Page 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11382. Page A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11583. Page 0C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11784. Page 1C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11985. Page 38h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12186. MODE SELECT (55) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12287. Pre-Fetch (34) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12388. READ (08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12489. READ CAPACITY (25) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12590. Format of READ CAPACITYcommandreply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12691. ReadDefectData (37) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12792. Defect ListHeader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12893. Defect Descriptors of Bytesfrom Index Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12894. Defect Descriptors of Physical Sector Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12995. ReadExtended(28) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13096. READ BUFFER(3C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13197. READ BUFFERHeader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13298. READ BUFFERDESCRIPTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13399. READ LONG (3E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134100. REASSIGN BLOCKS (07) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135101. Format of REASSIGN BLOCKS data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136102. RECEIVE DIAGNOSTIC(1C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137103. RELEASE (17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139104. REQUESTSENSE(03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140105. RESERVE (16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141106. REZERO UNIT (01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142

    x OEM Spec. ofDCAS-34330/32160

  • 107. SEEK (0B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143108. SEEKEXTENDED (2B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144109. SEND DIAGNOSTIC(1D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145110. START/STOP Unit(1B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148111. SYNCHRONIZE CACHE (35) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149112. TESTUNIT READY (00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150113. VERIFY (2F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151114. WRITE (0A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152115. WRITE EXTENDED(2A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153116. WRITE AND VERIFY (2E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154117. WRITE BUFFER (3B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155118. WRITE BUFFER Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .156119. WRITE LONG(3F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160120. WRITE SAME (41) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161121. SCSI StatusByte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163122. Supported Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165123. SynchronousData TransferRequest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .166124. Initiator Request/Target Response (SCSIFast) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167125. TargetResponse to Initiator'sTransfer Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167126. Initiator Request/Target Response (SCSI Ultra/Wide). . . . . . . . . . . . . . . . . . . . . . . . . 168127. WideData TransferRequest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169128. Initiator Request/Target Response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169129. TargetRequest toInitiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170130. Queue Tag Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173131. Ignore Wide ResidueMessage Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174132. SCAM Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .181133. SCAM Identification string . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182134. Actioncodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183135. Summary ofIdle Time Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203136. Format ofSenseData . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205137. FieldPointerBytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .211138. ActualRetry Count Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212139. FormatProgress Indication Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212

    Figures xi

  • xii OEM Spec. ofDCAS-34330/32160

  • 1.0 General

    1.1 Introduction

    This documentdescribesfunctional andinterface specifications ofDCAS-34330 and DCAS-32160 3.5 inchhard disk drives. Both modelshave 50-pin, 68-pin or 80-pin (SCA-2)connector, andsupportLevel-2SCAM.

    Note: The specifications aresubject to changewithout notice.

    The interfaceconforms to the referred documentslisted in thenext section.The vendorspecific items andoptions supported by thedrive are described ineach section.

    1.2 References'draft' ANSI SCSI-2 standard, Revision 10L, Jan1994(DocumentX3.1311-1994)

    'draft' ANSI SCSI-3 Fast-20, X3T10/1071D

    'draft' ANSI SCSI-3SCAM, X3T10/855D Annex A

    1.3 GlossaryWord Meaning

    Kbpi 1,000Bits PerInch

    Mbps 1,000,000Bits per second

    MB 1,000,000bytes

    KB 1,000bytes unless otherwisespecified

    32KB 32 x 1,024bytes

    64KB 64 x 1,024bytes

    Mb/sq.in 1,000,000bits per square inch

    MLC MachineLevel Control

    PFA PredictiveFailure Analysis (Trademark of IBM Corp.)

    S.M.A.R.T. Self-MonitoringAnalysis andReporting Technology

    ADM Automatic Drive Maintenance

    SCAM SCSI Configured AutoMatically

    1.4 General CautionThe drive can be easilydamaged by shocks or ESD(Electric Static Discharge), so any damages applied tothe drive aftertaking out from the shippingpackage oropening of the ESD protective bag are the user'sresponsibility.

    Copyright IBM Corp. 1996 1

  • 2 OEM Spec. ofDCAS-34330/32160

  • 1.0 Outline of the drive

    Data capacity 4GB and 2GB

    50-pin, 68-pin, 80-pin (SCA-2)single-endedmodels

    SCSI-2 Standard

    SCSI-3FAST-20 WIDE ( up to 40 Mbytes/sectransfer )

    SCSI-3SCAM Level-2 support

    TaggedCommandQueuingsupport atchoice of 7x64KB or 3x128KB databuffer

    Multi-initiator support

    512 Bytes/sector

    Interleave factor 1:1

    Write Cache

    Segmenteddatabuffer, 7x64KB, 3x128KB or 1x448KB at user choice

    ECC on the fly

    Autometic error recoveryprocedures for read andwrite commands

    Self diagnostics onpower on andresident diagnostics

    Transparentdefectmanagement with ADR ( AutomaticDefectReallocation )

    8.5 msecseek time inreadoperation

    5400rpm spindlerotation.

    Closed loopactuatorservo

    Dedicated headlandingzone

    Automatic actuator lock

    Informational ExceptionsControl Page of SCSI-3support asPFA or S.M.A.R.T. function

    Note: PFA which meansPredictiveFailure Analysis isTrademark of IBM Corporation.

    Copyright IBM Corp. 1996 3

  • 4 OEM Spec. ofDCAS-34330/32160

  • Part 1. Functional Specification

    Copyright IBM Corp. 1996 5

  • 6 OEM Spec. ofDCAS-34330/32160

  • 2.0 Fixed Disk Subsystem Description

    2.1 Control Electronics

    The drive is electronically controlled by a microprocessor,several logicmodules, digital/analogue modules,and variousdrivers and receivers. Thecontrol electronicsperform thefollowing major functions:

    Conducts a power-upsequence and calibrates the servo.Monitors various timers forheadsettling, servo failure, etc.Analyzes servosignals toprovide closed loopcontrol. Theseincludeposition errorsignal andestimatedvelocity.Controls thevoice coil motor driver to align theactuator onto adesiredposition.Monitors the actuatorposition anddetermines the target track for aseekoperation.Constantly monitorserror conditions of theservo and takes correspondingaction if an error occurs.Controlsstarting, stopping, and rotatingspeed of the spindle.Controls andinterprets allinterface signalsbetween thehost controller and thedrive.Controlsread writeaccessing of the diskmedia, includingdefectmanagement anderror recovery.Performsself-checkout (diagnostics).

    2.2 Head Disk Assembly

    The headdisk assembly(HDA) is assembled in a cleanroom environment and contains adisk andactuatorassembly. Air is constantlycirculated and filteredwhen thedrive is operational. Venting of the HDA isaccomplished via a breatherfilter.

    The spindle is driven directly by a brushless, sensorless DCdrive motor. Dynamicbraking is used tostop thespindle quickly.

    2.3 Actuator

    The read/write heads aremounted in theactuator. The actuator is aswing-arm assembly driven by avoicecoil motor. A closed-loop positioning servocontrols themovement of the actuator. Anembeddedservopatternsupplies feedback to thepositioning servo to keep the read/write heads centered over thedesiredtrack.

    The actuatorassembly is balanced to allowvertical or horizontalmounting without adjustment.

    When thedrive is poweredoff, the actuator automatically moves the head to adedicated landingzoneoutside of the dataarea, where theactuator islocked.

    Copyright IBM Corp. 1996 7

  • 8 OEM Spec. ofDCAS-34330/32160

  • 3.0 Drive Characteristics

    This chapterprovides the characteristics of thedrive.

    3.1 Formatted Capacity

    Figure 1. FormattedCapacity

    3.2 Data Sheet

    Description DCAS-34330 DCAS-32160

    Label Capacity(MB) 4330 2160

    Bytes per Sector 512 512

    Sectors perTrack 132-211 132-211

    Number ofheads 6 3

    Number ofdisks 3 2

    Number ofLBAs 8,467,200 4,226,725

    Total Logical Data Bytes 4,335,206,400 2,164,083,200

    Figure 2. Data Sheet

    Buffer to/from media [Mbit/sec] 62.5 to 103.4

    Host to/frombuffer ( interface transferrate )[Mbyte/sec]

    20 (50-pin)40 (68-pin, 80-pin)

    Data buffer size 448Kbyte

    Number ofbuffer segments 7 x 64Kbyte3 x 128Kbyte

    1 x 448Kbyte (withouttaggedqueuing)

    Rotationalspeed [RPM] 5400

    Recordingdensity [Kbpi] 114.4(Ave) /134.6(Max)

    Track density [TPI] 8600

    Areal density [Mb/sq.in.] 981(Ave) / 1158(Max)

    Data zone 8

    Copyright IBM Corp. 1996 9

  • 3.3 Cylinder Allocation

    Mode page 03(FormatDeviceParameters) and 0C(Zone Parameters) providemethods todeterminmediumformat and zone parameters. See7.12.4,“Page 3(FormatDeviceParameters)” onpage 108, and 7.12.9,“Page 0C(Notch Parameters)” onpage 117.

    3.4 Performance Characteristics

    A drive performance is characterized by thefollowing parameters:

    CommandOverheadMechanical Positioning− SeekTime− LatencyData Transfer SpeedBuffering Operation (Lookahead/Writecache)

    Note: All the above parameters contribute todrive performance. There areother parametersthat contributeto the performance of the actual system.This specification tries to define thebaredrive characteristics, notthe systemthroughputwhich will depend on thesystem and the application.

    Phys. Cyl. Sectors/Trk

    System Area

    Data Zone 0 0-857 211

    Data Zone 1 858-2684 198

    Data Zone 2 2685-3362 184

    Data Zone 3 3363-4287 176

    Data Zone 4 4288-5379 165

    Data Zone 5 5380-6242 154

    Data Zone 6 6243-6920 145

    Data Zone 7 6921-8209 132

    System Area

    10 OEM Spec. ofDCAS-34330/32160

  • 3.4.1 Command overhead

    Commandoverhead isdefined as thetime required:

    from last byte of commandphaseto the firstbyte of data phaseexcluding− Physicalseek time− Latency time− Initiator delay with reconnections

    Figure 3. CommandOverhead

    3.4.2 Mechanical Positioning

    3.4.2.1 Average Seek Time (Including Settling)

    “Typical” and “Max” are given throughout theperformancespecification by;

    Typical Average of the drivepopulationtested atnominal environmental andvoltageconditions.Max Maximum valuemeasured on any onedrive over thefull range of theenvironmental and

    voltageconditions. (See 6.4,“Environment” onpage 36 and 6.5, “DCPowerRequirements” onpage 37 for ranges.)

    The seektime is measured from the start ofactuator'smotion to thestart ofa reliable read or write opera-tion. Reliable read or write impliesthat error correction/recovery is not used to correctarrival problems.The average seektime is measured as theweighted average of allpossibleseekcombinations.

    WeightedAverage =

    ∑max

    n = 1

    ( max + 1− n) (Tn.in + Tn.out)

    ( max + 1) ( max)

    Where:max = Maximumseeklengthn = Seeklength (1 tomax)Tn.in = Inwardmeasuredseektime for an n trackseekTn.out = Outwardmeasuredseek time for an ntrack seek

    Command Case (Drive is in quiescencestate) Time

    Cache Not Hit

  • 3.4.2.2 Full Stroke Seek

    Full strokeseek ismeasured as theaverage of 1000 fullstrokeseekswith a random headswitch from bothdirections (inward andoutward).

    3.4.2.3 Cylinder Switch Time (Cylinder Skew)

    A cylinder switchtime is defined as theamount of timerequired by thefixed disk access thenext sequentialblock after reading the last sector in thecurrentcylinder.

    The measuredmethod isgiven in 3.4.6, “Throughput” on page 15.

    3.4.2.4 Head Switch Time (Head Skew)

    3.4.2.5 Average Latency

    Figure 5. Full StrokeSeekTime

    Function Typical Max.

    Read [msec] 15 18

    Write [msec] 15.5 19

    Figure 6. Cylinder Skew

    Typical

    Cylinder Skew 3.2 [msec]

    Figure 7. Head Skew

    Typical

    Head Skew 1.9 [msec]

    Figure 8. Latency Time

    Rotation Time for a revolution Average Latency

    5400 [RPM] 11.1 [msec] 5.56 [msec]

    12 OEM Spec. ofDCAS-34330/32160

  • 3.4.3 Drive Ready Time

    Ready The condition in which thedrive is able toperform a mediaaccesscommand(eg. read, write)immediately.

    Power On This includes the time required for the internalself diagnostics.

    3.4.4 Data Transfer Speed

    Instantaneousdisk-buffer transferrate (Mbyte/sec) isderived by:(Number ofsectors on a track)*512*(revolution/sec)

    Note: Number ofsectors per trackwill vary because of the linear density recording.

    Sustaineddisk-buffer transferrate (Mbyte/sec) isdefined by consideringhead/cylinder change time. Thisgives alocal average data transferrate. It is derived by:

    (Sustained TransferRate) = A/ ( B + C + D )

    A = (Number ofdatasectors per cylinder) * 512B = ((# of Surface per cylinder) - 1) *(Headswitch time)C = (Cylinder change time)D = (# of Surface) *(One revolution time)

    InstantaneousBuffer-Host TransferRate(Mbyte/sec)defines themaximum datatransfer rate onSCSIBus. It also depends on the speed of thehost.

    The measurementmethod isgiven in 3.4.6, “Throughput” onpage 15.

    Figure 9. DriveReadyTime

    Condition Typical Max.

    Power On to Ready(DCAS-34330) 15 [sec] 20 [sec]

    Power On to Ready(DCAS-32160) 12 [sec] 18 [sec]

    Figure 10. Data Transfer Speed

    Description Typical

    Disk-Buffer Transfer(Zone 0)

    (Instantaneous) 9.72 [Mbyte/sec]

    (Sustained) DCAS-34330 8.1 [Mbyte/sec]DCAS-32160 8.0 [Mbyte/sec]

    Disk-Buffer Transfer(Zone 7)

    (Instantaneous) 6.08 [Mbyte/sec]

    (Sustained) DCAS-34330 5.1 [Mbyte/sec]DCAS-32160 5.0 [Mbyte/sec]

    Buffer-Host

    50-pin FAST-2068-pin / 80-pinFAST-20 Wide

    20 [Mbyte/sec]40 [Mbyte/sec]

    Drive Characteristics 13

  • 3.4.5 Buffering Operation (Lookahead/Write Cache)

    At shipment, the total 448Kbytes of the buffer is dividedinto 7 segmented blocks.

    The segmentsize can bechanged byMode Page 8. See7.12.7,“Page 8 (Caching Parameters)” onpage 113for details.

    14 OEM Spec. ofDCAS-34330/32160

  • 3.4.6 Throughput

    3.4.6.1 Simple Sequential Access

    The above tablegives the timerequired to read/write for atotal of 8000xconsecutive blocks(16,777,216bytes)accessed by 128read/writecommands.Typical and Maxvalues are given by105% and 110% of Trespectivelythroughputfollowing performance description.

    Note: Assumes ahost system responds instantaneously.T = (A * 128) + B + C + 16,777,216/D + 512/E (READ)T = (A * 128) + B + C + 16,777,216/D (WRITE)

    where:T = CalculatedTime (sec)A = CommandProcessTime (Pre/PostCommandoverhead)B = Average SeekTimeC = AverageLatencyD = Sustained Disk-Buffer TransferRate(Mbyte/sec)E = Buffer-Host TransferRate(Mbyte/sec)

    3.4.6.2 Random Access

    The above tablegives the timerequired to execute atotal of 1000xread/writecommandswhich access arandom LBA.

    T = (A + B + C + 512/D + 512/E) *4096 (READ)T = (A + B + C + 512/D) * 4096 (WRITE)

    where:T = CalculatedTime (sec)A = CommandProcessTime (Pre/PostCommandoverhead)B = Average SeekTimeC = AverageLatencyD = Sustained Disk-Buffer TransferRate(Mbyte/sec)E = Buffer-Host TransferRate(Mbyte/sec)

    Figure 11. Simple Sequential AccessPerformance

    Operation Typical Max

    SequentialRead/Write Zone 0 2.26 [sec]Zone 7 3.56 [sec]

    Zone 0 2.37 [sec]Zone 7 3.73 [sec]

    Figure 12. RandomAccessPerformance

    Operation Typical Max

    RandomRead 64 [sec] 67 [sec]

    RandomWrite 64 [sec] 67 [sec]

    Drive Characteristics 15

  • 3.4.7 Operating Mode DefinitionOperating Mode DescriptionSpin-Up Start up time period fromspindlestop or power down.Seek Seekoperation modeWrite Write operation modeRead Readoperation modeIdle Spindlemotor andservo system are workingnormally. Commands can bereceived

    and processed immediately.Standby Spindlemotor isstopped. Commands can bereceivedimmediately, but write or read

    operationscannotbegin until the spindle isspun-up and theServo system is ready.

    Note: Upon Power down orSpindlestopped, a headlocking mechanismwill secure theheads in the IDparking position.Recovering from Standby modedoes not need softreset norhard reset.

    3.4.7.1 Mode Transition Time

    Note: The actual spin down timewill exist, however thecommandwill be processed immediately.

    Figure 13. Mode Transition Time

    From To Typical Max

    Standby Idle 15 [sec] (DCAS-34330)12 [sec] (DCAS-32160)

    20 [sec] (DCAS-34330)18 [sec] (DCAS-32160)

    Idle Standby Immediate (note) Immediate (note)

    16 OEM Spec. ofDCAS-34330/32160

  • 4.0 Data integrity

    The driveretains recordedinformation under all non-write operations.No more than onesector can be lost bypower downduring writeoperationwhile write cache is disabled.If power downoccurs beforecompletion of datatransferfrom write cache to disk while write cache isenabled, the dataremaining in write cachewill be lost. To prevent this dataloss atpower off, the followingaction is recommended:

    To confirm successfulcompletion ofSYNCHRONIZE CACHE(35h) command.

    4.1 Equipment Status

    Equipmentstatus isavailable to thehost system any time thedrive is not ready toread, write, orseek. Thisstatus normallyexists atpower-on time andwill be maintained until thefollowing conditions aresatisfied.

    Accessrecalibration/tuning is complete.Spindle speed meets requirements forreliableoperations.Self-check of drive iscomplete.

    Appropriateerror status is madeavailable to thehost system if any of the followingcondition occursafterthe drive hasbecomeready:

    Spindle speedgoesoutside of requirements forreliableoperation.“Write fault” is detected.

    4.2 Error Recovery

    Errors occurring with thedrive arehandled by the errorrecoveryprocedure.

    Errors that areuncorrectableafter application of the errorrecoveryprocedures are reported to thehostsystem as non-recoverable errors.

    Copyright IBM Corp. 1996 17

  • 18 OEM Spec. ofDCAS-34330/32160

  • 5.0 Physical Format

    Media defects areremapped to the nextavailable sector duringFormatProcess in manufacturing. Themapping from LBA to thephysicallocations is calculated by an internalmaintained table.

    5.1 Shipped Format (PList)Data areas areoptimally used.

    No extra sector is wasted as a sparethroughout user dataareas.

    All pushesgenerated bydefects areabsorbed byspare tracks of inner zone.No spare sector at each track or zone. Spare sectors arereserved after max LBA of data area.

    P L i s t P h y s i c a l F o r m a t

    Ä Ä ÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂ Ä Ä³ N ³ N + 1 ³ ³ N + 2 ³ ³ N + 3 ³³ ³ ³D e f e c t ³ ³D e f e c t ³ ³

    Ä Ä ÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁ Ä Ä³ A ³ AÀÄÄÄÄÄÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ

    S k i p S k i p

    Defects areskipped without any constraint, such astrack or cylinder boundary. Thecalculation from LBA tophysicalis doneautomatically by internal table.

    5.2 Reassigned Format (GList)252 spare sectors are available atshipmentfollowing after Max LBA of data area, and areused byAuto-matic DefectReallocation and Reassign BlockCommand.

    G L i s t P h y s i c a l F o r m a t

    Ä Ä ÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂ Ä Ä³ N ³ N + 1 ³ ³ N + 3 ³ N + 4 ³ ³ N + 6 ³ N + 7 ³ N + 8 ³³ ³ ³D e f e c t ³ ³ ³D e f e c t ³ ³ ³ ³

    Ä Ä ÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁ Ä Ä³ ³³ ³R e a s s i g n³ R e a s s i g n ÀÄÄÄÄÄÄ¿ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³

    ³ ³V V

    Ä Ä ÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂÄÄÄÄÄÄÂ Ä Ä³ M a x ³ M a x . ³ M a x ³ M a x ³ M a x ³ N + 2 ³ N + 5 ³ ³ ³³ L B AÄ4³ L B AÄ3³ L B AÄ2³ L B AÄ1³ L B A ³ ³ ³S p a r e ³S p a r e ³

    Ä Ä ÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÁ Ä Ä

    Calculation from LBA tophysical isdoneautomatically by internal table.

    Copyright IBM Corp. 1996 19

  • 20 OEM Spec. ofDCAS-34330/32160

  • 6.0 Specification

    6.1 Electrical Interface Specification

    6.1.1 Connectors

    6.1.1.1 Power Connector

    Power pinassignment of 80-pin (SCA-2)model is shown in6.1.1.4,“SCSI SignalConnector(80-pin)” onpage 23.Power pinassignment of 50-pin and 68-pin models is asshownbelow.

    Figure 14. Power Connector PinAssignments

    6.1.1.2 SCSI Signal Connector (50-pin)

    The SCSIsignalconnectorcomplies withANSI SCSI-2.

    Pin1234

    Voltage+ 12 VGNDGND+ 5 V

    Figure 15. Table ofSignals

    PIN SIGNAL PIN SIGNAL

    01030507091113151719212325272931333537394143454749

    GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundOpenGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGround

    02040608101214161820222426283032343638404244464850

    -DB(0)-DB(1)-DB(2)-DB(3)-DB(4)-DB(5)-DB(6)-DB(7)-DB(P)GroundGroundGroundTRM PowerGroundGround-ATNGround-BSY-ACK-RST-MSG-SEL-C/D-REQ-I/O

    Copyright IBM Corp. 1996 21

  • 6.1.1.3 SCSI Signal Connector (68-pin)

    The pin assignments of interfacesignalsconforms toANSI SCSI-3X3T10/855D asfollows.

    Figure 16. Table ofSignals

    ConnectorContactNumber

    Signal Name ConnectorContactNumber

    Signal Name

    01020304050607080910111213141516171819202122232425262728293031323334

    GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundTERMPWRTERMPWR(Reserved)GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGround

    35363738394041424344454647484950515253545556575859606162636465666768

    -DB(12)-DB(13)-DB(14)-DB(15)-DB(P1)-DB(0)-DB(1)-DB(2)-DB(3)-DB(4)-DB(5)-DB(6)-DB(7)-DB(P0)GroundGroundTERMPWRTERMPWR(Reserved)Ground-ATNGround-BSY-ACK-RST-MSG-SEL-C/D-REQ-I/O-DB(8)-DB(9)-DB(10)-DB(11)

    22 OEM Spec. ofDCAS-34330/32160

  • 6.1.1.4 SCSI Signal Connector (80-pin)

    The pin assignments of interfacesignalsconform to SFF-8046 asfollows.

    Figure 17. Table ofSignals

    ConnectorContactNumber

    Signal Name ConnectorContactNumber

    Signal Name

    01020304050607080910111213141516171819202122232425262728293031323334353637383940

    12 Volt Charge12 Volt12 Volt12 Volt(Reserved)(Reserved)-DB(11)-DB(10)-DB(9)-DB(8)-I/O-REQ-C/D-SEL-MSG-RST-ACK-BSY-ATN-DB(P0)-DB(7)-DB(6)-DB(5)-DB(4)-DB(3)-DB(2)-DB(1)-DB(0)-DB(P1)-DB(15)-DB(14)-DB(13)-DB(12)5 Volt5 Volt5 Volt Charge(Reserved)AUTO SPIN UPSCSI ID (0)SCSI ID (2)

    41424344454647484950515253545556575859606162636465666768697071727374757677787980

    12V Ground12V Ground12V GroundMATED 1(Reserved)GroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundGroundMATED 25V Ground5V GroundACTIVE LED OUTDELAYED STARTSCSI ID (1)SCSI ID (3)

    Specification 23

  • 6.1.2 SCSI Cable

    The drivescomply with ANSI X3T10/1071D.

    The maximumcumulativesignal pathlength betweenterminatorsshall be 3.0meterswhen using up to 4maximumcapacitance(25pF) devices.

    The maximumcumulativesignal pathlength betweenterminatorsshall be 1.5meterswhen using from 5 to 8maximumcapacitancedevices.

    Implementation thatlimits the transfer rate to amaximum of 5 megatransfers persecond may extend thecumulative cable length to 6m asdescribed inANSI X3T10/855D.

    6.1.3 SCSI Bus Terminator

    The drivescomply with ANSI X3T10/1071D.

    Active terminator asspecified inANSI X3T10/1071D should beused.

    Terminatorsemploying a 220 ohm resistor to 5 Volts and 330 ohm resistor toground oneachsignal shallnot be used. (Passiveterminators should not be usedfor FAST-20.)

    Note : The drive may not spin up while SCSI Bus isdisconnected and internal terminator is disabled.

    Internal terminatorenabled byjumper plug is equipped in thedrive except 80-pin (SCA-2)model.

    The 80-pin (SCA-2)model does nothave internalterminator.

    6.1.4 Hot Plug / Unplug

    Powersupply and SCSI bus hot plug and unplug isallowed.There is nospecialsequence required forcon-necting 5 or 12 volts.During a hotplug-in event thedrive being pluggedwill draw alargeamount ofcurrentat the instant ofplug-in. This currentspike is due to charging the bypass capacitors on thedrive. Thiscurrent pulse maycause thepower supply to go out ofregulation. If this supply is shared byother drivesthen a lowvoltagepower onreset may be initiated onthosedrives. Therefore the recommendation for hotplugging is tohave one supply for eachdrive. Never daisychain the powerleads if hot plugging isplanned.Hot pluggingshould be minimized to preventwear on thepower connector.

    Hot plugging of theSCSI bus maycauseglitches on thebus. To minimize the chance ofglitching, it isrecommended to plug in the SCSI busbefore thepower isapplied.

    During hot plugging, the suppliesmust not goover theuppervoltage limit. In addition, proper ESD pro-tection must beapplied during thepluggingevent to insurethat the SCSI bus ground is at thesamepoten-tial as the driveground.

    If operating shocklimit can be exceeded at hotun-plugging, spindlemotor should be stoppedusingSCSIStop Unit commandprior to the hot un-plugging.

    24 OEM Spec. ofDCAS-34330/32160

  • 6.1.5 SCSI Bus Electrical Characteristics

    The interface logic signals has the following electrical specifications.Details should be referred toANSIX3T10/1071D.

    I n p u t s : I n p u t H i g h V o l t a g e = 1 . 9 V d c m i n i m u m ( s i g n a l f a l s e )I n p u t L o w V o l t a g e = 1 . 0 V d c m a x i m u m ( s i g n a l t r u e )

    O u t p u t s : O u t p u t H i g h V o l t a g e = 2 . 5 t o 3 . 7 V d c ( s i g n a l a s s e r t e d )O u t p u t L o w V o l t a g e = 0 . 0 t o 0 . 5 V d c ( s i g n a l n e g a t e d )

    Figure 18. Logic Signal Levels

    6.1.6 Auxiliary Connector on 68-pin Model

    The 68-pin modelscontainAuxiliary Connectorbetween power connector and68-pin SCSI connector inaddition toOption JumperBlock. The setting atOption JumperBlock and the AuxiliaryConnector workas logical OR.

    Pin #1,3,5,7specifySCSI-ID as-DAS0,1,2,3.Tie-down to the ground is toassert.

    If pin #4 is tied-down to the ground,Auto Spin Up isdisabled.

    Pin #8 is for external LEDcathod.

    If pin #9 is tied-down to the ground, SCSITerminator isenabled.

    Specification 25

  • ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄD A S 3 ÄÄ¿³ ÚÄÄÄÄÄÄÄÄÄÄÄ ÄD A S 2 ÃÄÄÄ S C S I I D

    E n a b l e S C S I T e r m i n a t o r ÄÄÄÄÄÄ¿ ³ ³ ÚÄÄÄÄÄÄÄ ÄD A S 1 ³+ 5 V ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ³ ³ ³ ÚÄÄÄ ÄD A S 0 ÄÄÙ

    ³ ³ ³ ³ ³ ³

    P i n # : 1 1 9 7 5 3 1ÚÄÄÄÄÄÄÄÄÄÄÄ¿ ÚÄÄÄÄÄÄÄÄÄÄÄ¿³ ÚÄÄÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄ¿ ³³ ³ ³ ³³ ³ o o o o o o ³ ³³ ³ ³ ³³ ³ o o o o o o ³ ³³ ³ ³ ³³ ÀÄ¿ ÚÄÄÄÄÄ¿ ÚÄÙ ³ÀÄÄÄÙ ÀÄÄÄÄÄÙ ÀÄÄÄÙ

    1 2 1 0 8 6 4 2

    ³ ³ ³ ³ ³ ³( R e s e r v e d ) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ ³ ³ ³ ÀÄÄÄ ( R e s e r v e d )G R O U N DÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ ³ ÀÄÄÄÄÄÄÄ D i s a b l e A u t o S i p n U pL E D C a t h o d ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÄÄÄ ( R e s e r v e d )

    Auxiliary Connector

    26 OEM Spec. ofDCAS-34330/32160

  • 6.2 Option Jumper Block

    The 12 positionsjumper block shownbelow is used to select theSCSI device ID, Auto spin upoptioncontrol, Unit Attentionoption control, SCSI terminatorON/OFF setting,Auto start delayoption controland SCSIparity option control. It also provides an externalLight Emitting Diode connection.

    Some of the aboveitems can be alsocontroledthroughAuxiliary Connector asdescrived in 6.1.6,“AuxiliaryConnector on68-pin Model” on page 25.These controls work aslogical OR betweenOption JumperBlockand Auxiliary Connector.

    D C p o w e r ÚÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿C o n n e c t o r ³ ³ ³ ³

    ³ ³ ³ ³ÃÄÄÄÄ´ ³ ³

    A u x i l i a r y ³ ³ L o g i c c a r d ³ ³C o n n e c t o r ³ ³ ³ ³

    ÃÄÄÄÄ´ ³ ³³ ³ ³ ³³ ³ ÚÄÄÄ´P o s i t i o n # 1 ³

    S C S I 6 8 Äp i n ³ ³ ³ ³ ³C o n n e c t o r ³ ³ ³ ³

  • N o t e : ( x ) s h o w s P o s i t i o n N u m b e r

    ÚÄÄÄÄÄÄÄÄ¿³ ³³ ÀÄÄÄÄÄÄÄ¿³ ³³ ³

    G R O U N DÄÄÄÄÂÄÄÄ ³ 2 3 ( 1 ) 2 4 ³ ÄÄÄ ÄD A S 3 ÄÄ¿³ ³ ³ ³³ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ³ÃÄÄÄ ³ ³2 1 ( 2 ) 2 2 ³ ³ ÄÄÄ ÄD A S 2 ÄÄ´³ ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ ³³ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ ³ÃÄÄÄ ³ ³1 9 ( 3 ) 2 0 ³ ³ ÄÄÄ ÄD A S 1 ÄÄÅÄÄ S C S I I D³ ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ ³³ ³ ³ ³ÃÄÄÄ ³ 1 7 ( 4 ) 1 8 ³ ÄÄÄ ÄD A S 0 ÄÄÙ³ ³ ³³ ³ ³ÃÄÄÄ ³ 1 5 ( 5 ) 1 6 ³ ÄÄÄ D i s a b l e A u t o S p i n U p³ ³ ³³ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿ ³ÃÄÄÄ ³ ³1 3 ( 6 ) 1 4 ³ ³ ÄÄÄ E n a b l e S C S I T e r m i n a t o r ( 5 0 , 6 8 Äp i n )³ ³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ ³³ ³ ³ÃÄÄÄ ³ 1 1 ( 7 ) 1 2 ³ ÄÄÄ D i s a b l e U n i t A t t e n t i o n³ ³ ³³ ³ ³ÃÄÄÄ ³ 9 ( 8 ) 1 0 ³ ÄÄÄ E n a b l e T I ÄS D T R ( 5 0Äp i n )³ ³ ³ E n a b l e T I ÄS D T R / W D T R ( 6 8 , 8 0 Äp i n )³ ³ ³ÃÄÄÄ ³ 7 ( 9 ) 8 ³ ÄÄÄ E n a b l e A u t o S t a r t D e l a y³ ³ ³³ ³ ³ÃÄÄÄ ³ 5 ( 1 0 ) 6 ³ ÄÄÄ D e l a y S t a r t 6 / 1 2³ ³ ³³ ³ ³ÀÄÄÄ ³ 3 ( 1 1 ) 4 ³ ÄÄÄ D i s a b l e S C S I P a r i t y C h e c k

    ³ ³³ ³

    L E D A n o d e ÄÄÄ ³ 1 ( 1 2 ) 2 ³ ÄÄÄ L E D C a t h o d³ ³³ ³³ ÚÄÄÄÄÄÄÄÙ³ ³ÀÄÄÄÄÄÄÄÄÙ

    ÚÄÄÄÄÄÄÄÄÄÄÄÄ¿N o t e : ³x x ( x ) x x ³ s h o w s d e f a u l t s e t t i n g a t s h i p m e n t

    ÀÄÄÄÄÄÄÄÄÄÄÄÄÙ o f 5 0 Äp i n a n d 6 8 Äp i n m o d e l s .8 0 Äp i n m o d e l h a s n o d e f a u l t j u m p e r .

    Figure 20. OptionJumperBlock Assignment

    28 OEM Spec. ofDCAS-34330/32160

  • 6.2.1 Jumper Signal Description

    Throughoutthis paragraph ONmeans a shunt jumper isinstalled and OFFmeans that no shunt jumper isinstalled.

    6.2.1.1 Device address select lines. (-DAS0, -DAS1, -DAS2, -DAS3)

    These fourlines definesDCAS-3xxxx device ID on theSCSI BUS. -DAS0 is theleast significant bit and-DAS3 is the mostsignificant bit. Device ID is defined as follows.

    ÄD A S 3 ÄD A S 2 ÄD A S 1 ÄD A S 0P o s i t i o n # ÄÄ> ( 1 ) ( 2 ) ( 3 ) ( 4 ) D e v i c e I DÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

    o f f o f f o f f o f f 0 < ÄÄÄS h i p p i n go f f o f f o f f o n 1 d e f a u l to f f o f f o n o f f 2 o fo f f o f f o n o n 3 8 0 Äp i no f f o n o f f o f f 4o f f o n o f f o n 5o f f o n o n o f f 6 < ÄÄÄS h i p p i n go f f o n o n o n 7 d e f a u l to n o f f o f f o f f 8 o fo n o f f o f f o n 9 5 0 Äp i n / 6 8 Äp i no n o f f o n o f f 1 0o n o f f o n o n 1 1o n o n o f f o f f 1 2o n o n o f f o n 1 3o n o n o n o f f 1 4o n o n o n o n 1 5

    N o t e : 5 0 Äp i n m o d e l d o e s n o t u s e ÄD A S 3 , a n d o n l y D e v i c e I D ' s 0 t h r o u g h 7c a n b e a s s i g n e d .

    Figure 21. SCSIDevice ID

    6.2.1.2 Disable Auto Spin up. (Position 5)

    This input defines the drive autospin upoption. If the shunt jumper is notinstalled(OFF), thedrive willspin up automaticallyafter power onreset. If theshunt jumper isinstalled,thedrive will not spin up unlessthe hostsystemissues the"START COMMAND" to the drive.

    Note : The drive may not spin up while SCSI Bus isdisconnected and internal terminator is disabled.

    6.2.1.3 SCSI Terminator ON (Position 6)

    This position iseffective only for50-pin and 68-pin models.When this pin is connected tosignalground or jumper on, theinternal terminatorworks.

    Note : The drive may not spin up while SCSI Bus isdisconnected and internal terminator is disabled.

    Specification 29

  • 6.2.1.4 Disable Unit Attention. (Position 7)

    Groundingthis pin (jumper on)enablescontrol of UAI (Unit Attention Inhibit) bit inMode Page 0.

    6.2.1.5 Enable TI-SDTR (50-pin) / Enable TI-SDTR/WDTR (68,80-pin)

    Groundingthis pin (jumper on)enables the following.

    Target Initiated WideData TransferRequest Negotiation (68,80-pin)Target InitiatedSynchronousData TransferRequest Negotiation(50,68,80-pin)

    30 OEM Spec. ofDCAS-34330/32160

  • 6.2.1.6 Auto Start Delay & Delay Start 6/12 (Position 9 & 10)

    The Auto Start Delay and Delay Start 6/12 pinscontrol when and how thedrive canspin up, with thecombination ofDisableAuto Spin Up (Position 5). When both AutoSpin up andAuto Start Delayis areenabled, thedrive start will be delayed by aperiod of time multiplied by its ownSCSI address. IfAuto Spinup is disabled, thesejumperswill be ignored.

    D i s a b l e A u t o D e l a yA u t o S t a r t S t a r tS p i n u p D e l a y 6 / 1 2

    ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄP o s i t i o n # Ä> ( 5 ) ( 9 ) ( 1 0 ) O p t i o nÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

    o n a n y a n y D r i v e w i l l N o t s p i n u p .R e q u i r e s S t a r t C o m m a n d

    o f f o f f o f f S p i n u p i m m e d i a t e l y a f t e r P O R .

    o f f o n o f f S p i n u p 6 s e c o n d s m u l t i p l i e db y S C S I a d d r e s s a f t e r P O R

    o f f o n o n S p i n u p 1 2 s e c o n d s m u l t i p l i e db y S C S I a d d r e s s a f t e r P O R

    Figure 22. DisableAuto Spin Up ,AutoStart Delay & Delay Start

    6.2.1.7 Disable SCSI Parity Check (Position 11)

    Groundingthis pin will disableSCSI Paritychecking.

    6.2.1.8 LED pins (Position 12)

    The LED pins are used todrive anexternal LightEmitting Diode. Up to 8 mA ofsink current capability isprovided. The LEDAnode must betied to thecurrentlimited + 5 V source provided on Pin #1 of theOption JumperBlock. The LED Cathode is thenconnected to the Pin #2 to complete thecircuit.

    + 5 Vo³>< 6 2 0 O h m>³ÀÄÄÄÄÄÄÄÄÄÄÄÄÄo P i n # 1 f o r L E D A n o d e

    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄo P i n # 2 f o r L E D C a t h o d³/

    ÄÄÄ´³\ÀÄÄÄÄ¿

    ³ÄÄÁÄÄ

    / / /

    Figure 23. LEDCircuit

    Specification 31

  • 6.2.2 Shipping Default

    SCSI ID is set to #6 asshipping default.SCSI terminator isenabled as shipping default.

    No jumper is set asshipping default on 80-pinmodel.

    P o s i t i o n # :1 2 1 1 1 0 9 8 7 6 5 4 3 2 1

    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ¿³ ÚÄ¿ ÚÄ¿ ÚÄ¿ ³³ o o o o o o ³o³ o o ³o³ ³o³ o ³ÀÄ¿ ³ ³ ³ ³ ³ ³ ÚÄÙ³ o o o o o o ³o³ o o ³o³ ³o³ o ³³ ÀÄÙ ÀÄÙ ÀÄÙ ³ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ

    S h u n t j u m p e r s a r e i n s t a l l e d a t p o s i t i o n 2 , 3 a n d 6 a s s h i p p i n g d e f a u l to f 5 0 Äp i n / 6 8 Äp i n m o d e l . N o s h u n t j u m p e r i s i n s t a l l e d o n 8 0 Äp i n m o d e l .

    Figure 24. DefaultJumperSetting

    32 OEM Spec. ofDCAS-34330/32160

  • 6.3 LED Circuit

    Jumper pin #1 and #2 areused todrive anexternal LED.Instead of the thejumper pins, thefollowing pins can be used todrive LED.

    68-Pin Model : Auxiliary Connector Pin #8 and#11.80-Pin Model : SCA-2Connector Pin #77 as shown in6.3.3,“80-Pin Model” on page 35.

    The schematics of LED circuit on eachmodel are asfollows.

    6.3.1 50-Pin Model

    D C A SÄ3 4 3 3 / D C A S Ä3 2 1 6 0 5 0 ÄP i n M o d e l

    + 5 Vo³³>< 6 2 0 O h m>³³ÀÄÄÄÄÄÄÄÄÄÄÄÄÄo J u m p e r P i n # 1 f o r L E D A n o d e

    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄo J u m p e r P i n # 2 f o r L E D C a t h o d³/

    ÄÄÄ´³\ÀÄÄÄÄ¿

    ³³

    ÄÄÁÄÄ/ / /

    Figure 25. LEDCircuit of 50-PinModel

    Specification 33

  • 6.3.2 68-Pin Model

    D C A SÄ3 4 3 3 0 / D C A S Ä3 2 1 6 0 6 8 ÄP i n M o d e l : : E x a m p l e o f U s a g e: : a t S y s t e m S i d e: :: :

    5 V : :o : :³ A u x i l i a r y : :³ C o n n e c t o r P i n # 1 1 :ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo o ÄÄÄÄÄÄÄÄÄ¿³ f o r L E D A n o d e : : ³³ : : ³> : : ³< 6 2 0 O h m : : ÄÄÄÁÄÄÄ> : : \ /³ : : \ / L E D³ J u m p e r P i n # 1 : ÄÂij f o r L E D A n o d e : ³ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo : ³

    : : ³: : ³: : ³

    ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo : ³³/ ³ J u m p e r P i n # 2 : ³

    ÄÄÄ´ ³ f o r L E D C a t h o d : ³³\ ³ : : ³ÀÄÄÄÄ¿ ³ : : ³

    ³ > : : ³³ < 1 5 0 O h m : : ³³ > : : ³³ ³ : : ³³ ³ A u x i l i a r y : : ³

    ÄÄÁÄÄ ³ C o n n e c t o r P i n # 8 : ³/ / / ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo o ÄÄÄÄÄÄÄÄÄÙ

    f o r L E D C a t h o d : :: :: :

    Figure 26. LEDCircuit of 68-PinModel

    34 OEM Spec. ofDCAS-34330/32160

  • 6.3.3 80-Pin Model

    D C A SÄ3 4 3 3 0 / D C A S Ä3 2 1 6 0 8 0 ÄP i n ( S C A Ä2 ) M o d e l : : E x a m p l e o f U s a g e: : a t S y s t e m S i d e: :: :

    + 5 V + 5 V : : + 5 Vo o : : o³ ³ : : ³³ ³ : : ³> > : : >

    1 K O h m < < 6 2 0 O h m : : < 1 5 0 O h m> > : : >³ ³ : : ³³ ³ : : ³

    ÄÄÄÁÄÄÄ ³ : : ÄÄÄÁÄÄÄ\ / ³ : : \ /

    L E D \ / ³ : : \ / L E DÄÂÄ ³ J u m p e r P i n # 1 : ÄÂij ³ f o r L E D A n o d e : ³³ ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo : ³³ : : ³³ : : ³³ : : ³

    ÚÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo : ³³/ ³ J u m p e r P i n # 2 : ³

    ÄÄÄ´ ³ f o r L E D C a t h o d : ³³\ ³ : : ³ÀÄÄÄÄ¿ ³ : : ³

    ³ ³ : : ³ÄÄÁÄÄ ³ S C AÄ2 C o n n e c t o r P i n # 7 7 : ³

    / / / ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄo o ÄÄÄÄÄÄÄÄÄÙf o r L D E C a t h o d :

    : :: :

    Figure 27. LEDCircuit of 80-Pin(SCA-2) Model

    Specification 35

  • 6.4 Environment

    Figure 28. Environmental Condition

    Operating Conditions

    Temperature 5 to 55[˚C] (Seenote)RelativeHumidity 8 to 90 [% R H ] non-condensingMaximum WetBulb Temperature 29.4[ ˚C] non-condensingMaximum Temperature Gradient 15[ ˚C / Hour]Altitude − 300 to 3048 [m]

    Non-Operating Conditions

    Temperature − 40 to 65[˚C]RelativeHumidity 5 to 95 [% R H ] non-condensingMaximum WetBulb Temperature 35[˚C] non-condensingMaximum Temperature Gradient 15[ ˚C / Hour]Altitude − 300 to 12,000 [m]Note:

    The system has to providesufficient ventilation to maintain asurfacetemperature below 60[˚C] at thecenter of the top cover of thedrive.

    Non-Operating Condition should not continue beyond oneyear.

    36 OEM Spec. ofDCAS-34330/32160

  • 6.5 DC Power Requirements

    Connection to the product should be made inisolated secondary circuits (SELV). The following voltagespecification is applied at thepower connector of thedrive.No specialpower on/off sequencing isrequired.

    Notes:

    1. RandomSeeks at51.3% dutycycle.2. SeekDuty = 47%, W/R Duty = 53%,Idle Duty = 0%.

    Figure 29. Input Voltage

    During run and spin up Absolute max voltage

    + 5 Volts Supply 5V + / - 5% 7V

    + 1 2 Volts Supply 12V +10%, - 8% 15V

    Figure 30. PowerSupply Current of DCAS-34330with SCSI Terminator Enabled

    (All values in Amps.)+5Volts +12Volts Total

    (W)Pop Mean Std.Dev Pop Mean Std.Dev

    Idle Average 0.33 0.01 0.20 0.01 4.05

    Idle ripple (peak-to-peak) 0.38 0.01 0.25 0.01

    Seekpeak (*1) 0.60 0.01 0.95 0.03

    Seek average (*1) 0.41 0.01 0.32 0.02 5.90

    Start up (max) 0.42 0.01 1.83 0.02

    Random R/Wpeak(*2) 0.88 0.01 0.85 0.04

    Random R/Waverage (*2) 0.51 0.02 0.22 0.01 5.17

    Figure 31. PowerSupply Current of DCAS-32160with SCSI Terminator Enabled

    (All values in Amps.)+5Volts +12Volts Total

    (W)Pop Mean Std.Dev Pop Mean Std.Dev

    Idle Average 0.32 0.02 0.15 0.01 3.42

    Idle ripple (peak-to-peak) 0.37 0.02 0.19 0.01

    Seekpeak (*1) 0.59 0.01 0.91 0.02

    Seek average (*1) 0.41 0.01 0.28 0.02 5.43

    Start up (max) 0.40 0.01 1.80 0.03

    Random R/Wpeak(*2) 0.88 0.01 0.82 0.02

    Random R/Waverage (*2) 0.52 0.02 0.19 0.01 4.85

    Specification 37

  • During drive start up andseeking, 12volt ripple is generated by thedrive (referred to asdynamic loading). Ifseveralfiles have theirpower daisychained togetherthen the powersupply ripple plusother drive'sdynamicloadingmust remain within the regulation tolerance of+10/-8%. A common supply with separatepowerleads toeachdrive is amore desirablemethod ofpower distribution.

    To prevent external electrical noisefrom interfering with the drive'sperformance, thedrive must beheld byfour screws in a user system frame which has no electricallevel difference at the four screwsposition, and hasless than+/-300 milivolts peak to peaklevel difference to thedrive power connector ground.

    6.5.1 Start Up Current

    Figure 32. PowerSupply GeneratedRipple at DrivePower Connector

    Maximum Notes

    + 5 V DC 100 [mV pp] 0-10 [MHz]

    +12V DC 150 [mV pp] 0-10 [MHz]

    Figure 33. Typical Current WaveForm of 12V atStart Up of DCAS-32160

    38 OEM Spec. ofDCAS-34330/32160

  • 6.6 Reliability

    6.6.1 Contact Start Stop (CSS)

    The drive is designed towithstand aminimum of 40,000contact start/stop cycles under 40˚C environmentand a minimum of10,000contact start/stop cycles underextremetemperature or humidity environment.

    6.6.2 Data ReliabilityProbability of notrecovering data ....... 1 in 1013 bits readECC implementationOn-The-Flycorrection, performed as apart of read channel function,recovers up to 6symbols of errorin 1 sector. (1symbol is 8bits.)Off-line correction, performed as apart of retry procedure in thedrive, recovers up to 9symbols of errorin 1 sector.

    6.6.3 Seek/ID Mis-compare Errors

    A non-recoverableseek/ID mis-compareerror isdefined as a seekoperation that cannot becorrected byfixed disk error recoveryprocedure. Seek errorsoccurring forfield format operations arecon