Upload
masoboy2000
View
215
Download
0
Embed Size (px)
Citation preview
7/27/2019 Hp Sure Store
1/70
hp surestore auto path
virtual array
for Windows NT
installation and users guide
Version 1.03
Edition August 2001
Printed in U.S.A.
7/27/2019 Hp Sure Store
2/70
2
Notice
Hewlett-Packard Company, 2001. All rights reserved.
Hewlett-Packard Company makes no warranty of any
kind with regard to this material, including, but not
limited to, the implied warranties of merchantability and
fitness for a particular purpose. Hewlett-Packard shall not
be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing,
performance, or use of this material.
This document contains proprietary information, whichis protected by copyright. No part of this document may
be photocopied, reproduced, or translated into another
language without the prior written consent of
Hewlett-Packard. The information contained in this
document is subject to change without notice.
Safety Instructions
Denotes:
WARNING A hazard that can cause personal
injury
Caution A hazard that can cause hardware or
software damage
Note Significant concepts or operatinginstructions
Trademark Information
Microsoft, Windows NT, and Windows 2000 areregistered trademarks of Microsoft Corporation
Java and all Java-based marks are trademarks or
registered trademarks of Sun Microsystems, Inc. in
the United States and other countries.
HP, is a registered trademarks of Hewlett-Packard
Company.
Command View, Secure Manager, Business Copy,
Auto Path, Smart Plug-Ins are trademarks of
Hewlett-Packard Company
Format Conventions
literal Specifies text to be typed exactlyas shown, such as commands,
path names, file names, and
directory names.
variable Indicates that you must supply a
value.
output Denotes text displayed on the
screen.
{ } Indicates that you must specify
one of the listed options.
| Separates alternatives.
7/27/2019 Hp Sure Store
3/70
3
1 Auto Path features 5Auto Path description 6
Dynamic load balancing 7
Automatic failover and recovery 8
System requirements 9
Product Contents 10
Auto Path VA Upgrade Licenses 11
HP Modular Storage Software Products 11
Warranty 13
Technical Support 13
2 Installation 15Installing Auto Path software 16Uninstalling Auto Path 17
3 Operation 19Configuring Auto Path using the graphical user interface 20
Navigation 22Servers window 24
Adding a server 26
Deleting a server 27
Refreshing the window 28
Diagnostic message panel 29
Server Settings window 31
CONTENTS
7/27/2019 Hp Sure Store
4/70
4
Accessing Auto Path help 32
About window 33
Server Details window 34
Disk Arrays window 36
Devices window 37
Adding new devices and paths 39
Device Settings window 40
Setting the load balancing policy 42
Setting the preferred path 44
Path Performance window 46Saving chart settings 49
Opening and restoring chart settings 50
Removing a plot from the chart 51
Changing settings 52
Adapters window 53
AdapterPathInfo window 55
Using Windows Performance Monitor 57
4 Command-line interface 59autopath adapters 60
autopath devices 61
autopath help 62
autopath paths device 63
autopath set device 64
5 Troubleshooting 65Recovering after a failure 66
Troubleshooting 67
Contacting HP customer service 68
Index 69
7/27/2019 Hp Sure Store
5/70
5
AUTO PATH FEATURES
HP Auto Path provides automatic input/output (I/O) path failover and load
balancing for host systems configured with multiple host adapters and
connections to a disk array.
Auto Path provides these features:
enhanced data availability
automatic path failover to an alternate path and path recovery
dynamic load balancing over multiple paths
both a graphical user interface (GUI) and a command-line interface
(CLI)
The GUI provides enhanced features, such as path performance windows.
7/27/2019 Hp Sure Store
6/70
6 HP Auto Path XP: Users Guide (Windows NT/2000)
Auto Path description
The HP Auto Path software performs dynamic load balancing of data flow
through multiple paths. It detects multiple paths to each logical device and
distributes the data load among the paths for optimum performance. It
automatically detects path failures and switches to alternate paths and also
recovers the failed paths after they are restored.
The user interface lets a system administrator define load balancing policies
and preferred paths, and view device path information. Auto Path managespaths according to the balancing policy, ensuring that no single path is a
performance bottleneck.
Normally, disk I/O is sent directly to the disk driver. Auto Path is a filter
driver that fits between the Windows disk driver and the host bus adapter
(HBA) driver (figure 1). Auto Path is transparent to the Windows operating
system and to the applications running on a server.
Figure 1. I/O Flow
The Auto Path GUI consists of two software components:
server
The server component runs on the host that is connected to the disk
array.
client
The client can run either on the host or from a remote PC connectedthrough the network.
System disk I/O Windows disk driver Auto Path Adapter driverdriver LUN
7/27/2019 Hp Sure Store
7/70
Auto Path features 7
Dynamic load balancing
Auto Path performs dynamic load balancing while monitoring each path to
ensure that the I/O transaction is completed. The load balancing policy is
selected by the administrator.
The dynamic load balancing policy prevents any path from becoming
overloaded, and it helps to prevent the congestion that occurs when many
I/O operations are directed to common devices along the same path.
If a preferred path is used for a device, the entire I/O for that particular
device flows through the preferred path. No load balancing is done by Auto
Path for that device.
7/27/2019 Hp Sure Store
8/70
8 HP Auto Path XP: Users Guide (Windows NT/2000)
Automatic failover and recovery
In the event of a failure of any part of a path between the disk array and a
server, Auto Path automatically switches to an alternate path, dropping the
failed path out of the I/O rotation without any loss of data. The failover is
not visible to applications, so normal operation continues, without
downtime. After the paths are restored, they are automatically detected and
used for I/O.
All path changes are logged in the Windows Event Viewer log. Servicepersonnel can use the log to investigate and repair failed paths.
For troubleshooting information, see Troubleshooting (page 67).
7/27/2019 Hp Sure Store
9/70
Auto Path features 9
System requirements
To install Auto Path, the system must conform to these requirements:
Windows NT with service pack 6
30 MB of local disk space available on the Windows NT system
administrator access to the Windows NT system
preformatted devices on the attached disk array for recognition and
use by Auto Path and Windows NT
1024 x 768 minimum display resolution
For specific installation requirements for your system, contact your HP
account representative.
Additional
Information
Support information about host bus adapters (HBA) driver pairs is in the
README.txt file on the Auto Path installation CD-ROM. If your HBA isnot listed, contact your HP account representative.
7/27/2019 Hp Sure Store
10/70
10 HP Auto Path XP: Users Guide (Windows NT/2000)
Product Contents
The contents of the Auto Path VA product include:
HP StoreStore Auto Path Virtual Array Installation and Users Guide
Software CD
1 Host License-to-Use Certificate
Installation and Users GuideSoftware CD
License-to-UseCertificate
7/27/2019 Hp Sure Store
11/70
Auto Path features 11
Auto Path VA Upgrade Licenses
A one host license-to-use is required for each installation of Auto Path VA.Upgrade licenses provide additional host usage for the Auto Path VA product.
These upgrade licenses can increase the host usage up to 25 hosts, depending on
the license purchased (see Table 1 on page 12). The contents of the upgrade license
include:
Software License Certificate
Storage envelope
Note Keep all Software License Certificates you receive for the HP
SureStore Auto Path Virtual Array product in a safe place.
The HP SureStore Auto Path Virtual Array product is licensed to you
according to the standard licensing terms defined on the HP Software
License Agreement you received with this product.
HP Modular Storage Software Products
Several optional software products are available to enhance the operation of the HP
SureStore Virtual Array. These optional software products are listed in the
following table. For the most up-to-date product information, access the HP Website.
Software License Certificate
7/27/2019 Hp Sure Store
12/70
12 HP Auto Path XP: Users Guide (Windows NT/2000)
Table 1 HP Modular Storage Software Products
Software Product HP Sales Rep. HP Reseller
Command View SDM
Storage device management enables array configuration and
management and provides value-added software products.
Software Package and 1 Host License-to-Use (LTU) T1001A T1020A
Enterprise Management Smart Plug-Ins
Enables Command View SDM in HP OpenView NNM, BMC Patrol,
CA-Unicenter TNG, and Tivoli Netview.
Software Package and 1 Host LTU T1002A T1021A
Business Copy Virtual Array
Enables online data replication or LUN copying within the array for
testing and backup, and requires the same physical space to be
available in the array as the LUN(s) being copied.
Software Package and 50 GB LTU500 GB Upgrade LTU
1 TB Upgrade LTU
T1007AT1008A
T1009A
T1026AT1027A
T1028A
Secure Manager Virtual Array
Enables LUNs to be locked into a secure shared environment.
Software Package and 50 GB LTU
500 GB Upgrade LTU1 TB Upgrade LTU
T1003A
T1004AT1005A
T1022A
T1023AT1024A
Auto Path Virtual Array for Windows NT
Enables I/O path fail-over in Windows NT environments with the
benefit of I/O load balancing in both failed and non-failed states.
Software Package and 1 Host LTU
1 Host Upgrade LTU
5 Host Upgrade LTU
10 Host Upgrade LTU
25 Host Upgrade LTU
T1039A
T1040A
T1041A
T1042A
T1043A
T1049A
T1050A
T1051A
T1052A
T1053A
7/27/2019 Hp Sure Store
13/70
Auto Path features 13
Warranty
This software package comes with a 90 day media defect warranty. If you have anyproblems with the quality of the CD or the supporting documentation, you can
return it for exchange through any HP sales office or authorized HP reseller.
Technical Support
Technical support is provided for this product through an HP Support Contract,
purchased at the time you purchased this product. See the HP Support Contract for
information on technical support.
For a list of the most current support phone numbers for the HP SureStore Auto
Path Virtual Array product, go to the following HP Web site:
www.hp.com/go/apva
7/27/2019 Hp Sure Store
14/70
14 HP Auto Path XP: Users Guide (Windows NT/2000)
7/27/2019 Hp Sure Store
15/70
15
INSTALLATION
Auto Path is installed using an automated installation program. After Auto
Path is installed, and the server software component is running on the host,
Auto Path is accessible from a networked PC where the client software is
installed.
7/27/2019 Hp Sure Store
16/70
16 HP Auto Path XP: Users Guide (Windows NT/2000)
Installing Auto Path software
To install Auto Path, you must have administrator privileges on thehost PC.
Caution Read the readme.txt file on the installation media for more details about
installation.
To install Auto Path:
1. Log on as administrator.
2. Insert the Auto Path installation CD into a local CD-ROM drive (for
example, drive D:).
3. If Autorun is enabled on the PC, the Auto Path installation window
appears, and you can follow the instructions to complete the installation.
4. If Autorun is not enabled, select Start Run.
5. Browse to the setup.exe file or enter D:\setup\setup.exe in the text box
(where D: is the drive letter for the CD-ROM drive).
6. Click OK to begin the installation.
The Auto Path installation window appears.
7. Follow the on-screen instructions to complete the installation.
The Auto Path Remote Access Server can either be installed as a
command line or as a Windows service.
7/27/2019 Hp Sure Store
17/70
Installation 17
Uninstalling Auto Path
To uninstall Auto Path, use the Windows Control Panel.
To uninstall Auto Path:
1. Open the Windows Control Panel.
2. Open Add/Remove Programs.
3. Select Auto Path.
4. Click the Add/Remove button.
5. Follow the on-screen instructions to uninstall the Auto Path program
files.
7/27/2019 Hp Sure Store
18/70
18 HP Auto Path XP: Users Guide (Windows NT/2000)
7/27/2019 Hp Sure Store
19/70
19
OPERATION
Auto Path operations can be accessed from both a graphical user interface
(GUI) and command line interface (CLI). Both the GUI and the CLI can be
used to display information about the logical devices on an attached disk
array and their associated I/O paths. The administrator can use the interface
to change the load balance policy or the preferred path to a device.
7/27/2019 Hp Sure Store
20/70
20 HP Auto Path XP: Users Guide (Windows NT/2000)
Configuring Auto Path using the graphical user interface
After installing Auto Path, you can start the Auto Path graphical userinterface (GUI) program. To start the Auto Path GUI program, you must
have administrator access to the server.
To use the interface, you must start both the user-interface server and client
GUI. Depending on the options that you selected during the installation,
you can start the server and client using either an icon on the Windows
desktop or from the Windows Start menu.
If you want to use the command line interface to configure Auto Path, see
Command-line interface (page 59).
To start the Auto Path user-interface server:
1. If you have Auto Path icons on your Windows desktop, select the icon
labeled Start HP Auto Path Server.
2. If you do not have the Auto Path icons on your Windows desktop, select:
Start Programs HP Auto Path Start Auto Path Server
A command window appears.
If the user-interface server is installed as a Windows service, the server is
started automatically.
To start the Auto Path client GUI:
1. If you have Auto Path icons on your Windows desktop, select the icon
labeled Start HP Auto Path Client.
2. If you do not have the Auto Path icons on your Windows desktop, select:
Start Programs HP Auto Path Start Auto Path Client
7/27/2019 Hp Sure Store
21/70
Operation 21
The Servers window opens.
Example
If this is the first time that Auto Path is opened after installation, the
window shows localhost server by default. To add servers to the program,
use the Add New Server window. See Adding a server (page 26).
7/27/2019 Hp Sure Store
22/70
22 HP Auto Path XP: Users Guide (Windows NT/2000)
Navigation
The Auto Path GUI configuration windows feature a navigational treestructure that shows the distribution of servers, disk arrays, adapters, and
devices in the system. At startup, the tree is automatically populated.
Example
Tree structure functionality
Servers Root of the hierarchy that contains all configuredservers as nodes. Select a server to display the Serverswindow; see Servers window (page 24).
Server nodes Expand a server node to show DiskArrays andAdapters.
DiskArrays Node that contains disk arrays on the parent server.
Select to display the Disk Arrays window; see DiskArrays window (page 36). Expand to show disk arraynodes.
Disk Array nodes Disk array nodes are identified by disk array names.Select to display the Devices window; see Deviceswindow (page 37). Expand to show devices in the diskarray unit.
7/27/2019 Hp Sure Store
23/70
Operation 23
Device nodes Device nodes are identified by device names. Select todisplay the Device Settings window; see DeviceSettings window (page 40).
Adapters Node that contains adapters on the parent server. Selectto display the Adapters window; see Adapterswindow (page 53). Expand to show adapter nodes.
Adapter nodes Adapter nodes are identified by adapter names. Selectto display the AdapterPathInfo window; seeAdapterPathInfo window (page 55).
7/27/2019 Hp Sure Store
24/70
24 HP Auto Path XP: Users Guide (Windows NT/2000)
Servers window
Auto Path opens with the Servers window. This window shows the namesof the servers and the status of the Auto Path software on them. At startup,
the tree in the left panel is automatically populated.
To access this window, select Servers, the root of the tree structure.
Example
The Servers window displays server information:
Server # An index number used by Auto Path for identifying theserver.
Server Name The server name.
7/27/2019 Hp Sure Store
25/70
Operation 25
Status The status of the server:
Auto Path Server Up The target server is
operational.
Auto Path Server Down The target server is down orit is not running the AutoPath GUI server.
Auto Path Driver Not The Auto Path driver is not
Functioning running on the target server.
Status update in The update of the Auto Pathprogress Server status is in progress.
7/27/2019 Hp Sure Store
26/70
26 HP Auto Path XP: Users Guide (Windows NT/2000)
Adding a server
You can add a new server to the list of available servers for Auto Path byusing the Add New Server dialog box.
To add a server:
1. From the Servers window, select Add New Server from the File drop-
down menu
The Add New Server dialog box opens.
Example
2. In the Server Name box, type the server name or the IP address for the
server you want to add.
3. Select Add.
The server name is added as a node on the Servers tree in the left panel
of the Servers window. The corresponding server information is
displayed in the right panel.
7/27/2019 Hp Sure Store
27/70
Operation 27
Deleting a server
You can delete a server from the list of available servers for Auto Pathusing the Delete Server dialog box.
To delete a server:
1. From the Servers window, select Delete Server from the File drop-down
menu.
The Delete Server dialog box opens.
Example
2. From the Select Server drop-down box, select the server name of the
server you want to delete.
3. Select Delete.
The node of the selected server is deleted from the Servers tree in the
left panel of the Servers window. The corresponding server
information is removed from the right panel.
7/27/2019 Hp Sure Store
28/70
28 HP Auto Path XP: Users Guide (Windows NT/2000)
Refreshing the window
The View drop-down menu allows you to refresh the display to show thecurrent state of the selected server/devices. Select Refresh.
Example
7/27/2019 Hp Sure Store
29/70
Operation 29
Diagnostic message panel
The main window provides a diagnostic message panel that displays errormessages periodically for the active (selected) server. The error message
panel is located in the bottom right portion of the window.
Example
The error messages are color coded:
red A connection to a server has been lost, or adevice/path has disappeared.
green A connection to a server is established, or a
device/path has come up.
7/27/2019 Hp Sure Store
30/70
30 HP Auto Path XP: Users Guide (Windows NT/2000)
Error Log File
For the default installation, error messages are recorded in an Auto Path log
file:
\hpss\Auto Path\data\autopath.log
Set the log file size through the Set Log File Size command on the Options
menu.
Example
7/27/2019 Hp Sure Store
31/70
Operation 31
Server Settings window
Use the Server Settings window to change the update times for the serverstatus, device data, and path performance data.
7/27/2019 Hp Sure Store
32/70
32 HP Auto Path XP: Users Guide (Windows NT/2000)
Accessing Auto Path help
Use the Help drop-down menu to access Auto Path help.
Example
7/27/2019 Hp Sure Store
33/70
Operation 33
About window
The About window displays the HP Auto Path version number.
7/27/2019 Hp Sure Store
34/70
34 HP Auto Path XP: Users Guide (Windows NT/2000)
Server Details window
The Server Details window shows the disk arrays and adapters connected tothe selected server. This window is a view-only window; there are no user-
configurable functions.
To access the Server Details window, select the node of a server in the tree
view. The content of the window depends on the connection status of the
selected server.
Successful server connection
If the client is able to connect to the server, the DiskArrays and Adapters
folders appear in the main portion of the window.
Example
DiskArrays A folder equivalent to the DiskArrays node in the treeview. Select to display the Disk Arrays window; seeDisk Arrays window (page 36). The tree viewexpands to the level of the disk array nodes.
7/27/2019 Hp Sure Store
35/70
Operation 35
Adapters A folder equivalent to the Adapters node in the treeview. Select to display the Adapters window; seeAdapters window (page 53). The tree view expands
to the level of the adapter nodes.
Failed server connection
If the client is not able to connect to the server, the main portion of the
window appears empty. The status bar at the bottom of the window displays
a message:
Failed to connect to the server.
Example
7/27/2019 Hp Sure Store
36/70
36 HP Auto Path XP: Users Guide (Windows NT/2000)
Disk Arrays window
The Disk Arrays window shows the details of the disk arrays connected tothe selected server. This window is a view-only window; there are no user-
configurable functions.
To access the Disk Arrays window, select the Disk Arrays node of a server
in the tree view.
Example
The Disk Arrays window displays disk array information:
Disk Array # An index number used by Auto Path for identifying the
disk array.
Disk Array Name The serial number of the disk array.
# of Devices The number of devices on the disk array.
7/27/2019 Hp Sure Store
37/70
Operation 37
Devices window
The Devices window displays the devices for the selected disk array. Thiswindow is a view-only window; there are no user-configurable functions.
To access the Devices window, select a disk array node in the tree view.
Example
The Devices window displays device information:
Device# An index number used by Auto Path for identifying thedevice.
Device Name The device name.
Serial# The logical device serial number.
St t Th t t f th d i
7/27/2019 Hp Sure Store
38/70
38 HP Auto Path XP: Users Guide (Windows NT/2000)
State The state of the device:
Active The device is in use.
Failed The device is not in use or all pathsto the device have failed.
# of Paths The number of active paths attached to the device.
Load Balance PolicyThe policy currently selected for the device.
Preferred Path # For devices with no load balancing policy, this indicatesthe selected preferred path.
7/27/2019 Hp Sure Store
39/70
Operation 39
Adding new devices and paths
Windows NT
When you add a new device or a new path to an existing device, you must
run Windows Disk Administrator so that Auto Path can recognize it.
To recognize new devices or paths in Auto Path:
1. Start Windows Disk Administrator by selecting
Programs Administrative Tools Disk Administrator from theWindows Start menu.
2. After Disk Administrator is fully initialized and execution is finished,
you must refresh the Auto Path GUI. Return to the Devices window and
select Refresh from the View menu.
The new device or path is displayed in the Devices window.
3. Close Disk Administrator.
7/27/2019 Hp Sure Store
40/70
40 HP Auto Path XP: Users Guide (Windows NT/2000)
Device Settings window
The Device Settings window shows the paths to a device and its loadbalance policy and preferred path to the device in case of
No_Load_Balance policy.
Access this window by selecting a device node in the tree structure.
Example
The Device Settings window displays device information:
Load Balancing PolicyDisplays the load balancing policy for the device. The
drop-down list lets you choose from a list of policies.See Setting the load balancing policy (page 42).
Preferred Path Number(Displayed only when the current Load BalancingPolicy is No Load Balancing.) Displays the indexnumber of the preferred path for the device. Select thepreferred path to a device from the drop-down list.
Path # The index number for the path.
7/27/2019 Hp Sure Store
41/70
Operation 41
Path # The index number for the path.
State The state of the path:
Active The path to the device is available forI/O.
Failed The path to the device is not availablefor I/O.
Controller Port # The port number of the controller on the disk array to
which the device is connected.
Port.Bus.Target.LUNDisplays the physical path identifier.
Set Applies the changes.
Cancel Cancels the operation.
Path Performance Allows you to create and view performance graphs ofthe paths to the device; see Path Performancewindow (page 46).
7/27/2019 Hp Sure Store
42/70
42 HP Auto Path XP: Users Guide (Windows NT/2000)
Setting the load balancing policy
The Device Settings window lets you set the load balancing policy for aselected device.
All of the load balancing policies determine their actions based upon the
current queue depths of all of the paths available to the device. The only
difference between policies is how the queue depth is measured. All of the
policies, except Round Robin, tend to shift the I/O load from heavily loaded
paths or resources to more lightly loaded ones. If the average number of
requests outstanding to the device tends to be small, then all of the policies
behave like the Round Robin policy.
You can select from these load balancing policy options:
No Load BalancingNo load balancing performed. All I/O is routed through
the preferred path. See Setting the preferred path(page 44).
Default Balance PolicySame as Shortest Queue Service Time.
Round Robin The requests are cycled through each path sequentiallywithout regard to queue depth.
Shortest Queue RequestsMeasures the current queue depth by counting thenumber of requests outstanding for each path.
Shortest Queue BytesMeasures the current queue depth by the sum of the
sizes of the I/O requests outstanding on that path.
Shortest Queue Service Time(Default) Measures the current queue depth by the sumof the length of time each I/O request has beenoutstanding on that path.
To set the load balancing policy:
7/27/2019 Hp Sure Store
43/70
Operation 43
1. From the tree view, select the server, disk array, and device that you
want to set the load balancing policy for.
The Device Settings window opens (see page 40).
2. Select the load balancing policy from the Load Balancing Policy drop-
down list.
The new load balancing policy is displayed.
3. Select Set.
The load balancing policy is applied.
S tti th f d th
7/27/2019 Hp Sure Store
44/70
44 HP Auto Path XP: Users Guide (Windows NT/2000)
Setting the preferred path
The Device Settings window lets you set the preferred path when you haveno load balancing policy for a selected device.
If the current policy is not No Load Balancing, set the Load Balance Policy
to No Load Balancing for the device for which you want to set a preferred
path.
To set the preferred path:
1. From the tree view, select the server, disk array, and device that you
want to set the preferred path for.
The Device Settings window opens (see page 40).
2. Select the Preferred Path from the Preferred Path Number drop-down
menu.
The new Preferred Path is displayed. If the selected Preferred Path isdifferent from the Current Preferred Path, the OK button is enabled.
Example
3. Select Set.
7/27/2019 Hp Sure Store
45/70
Operation 45
The no load balancing policy and preferred path are applied.
Path Performance window
7/27/2019 Hp Sure Store
46/70
46 HP Auto Path XP: Users Guide (Windows NT/2000)
Path Performance window
The Path Performance window allows you to create and view performancecharts for selected paths of a device. The charts can be used to evaluate load
balancing policy or preferred paths.
To access the Path Performance window, select the Path Performance
button in the Device Settings window. The Path Performance window
opens separately from the main Auto Path window.
To close the window, select Exit from the File menu.
Example
Path performance chart
The chart contains plots based on the selected parameters. The y-axis is the
measure for the selected performance counter; the x-axis represents time.
To change the vertical maximum of the chart, see Changing settings
(page 52).
Chart parameters
7/27/2019 Hp Sure Store
47/70
Operation 47
Paths Drop-down box that is used to select the index numberof a path to be charted.
Counter A list of available counters, measured on the y-axis ofeach chart. Choices are:
% Disk Read Time% Disk Write Time% Disk Time
% Idle TimeDisk Read/secDisk Writes/secDisk Transfers/secCurrent Disk Queue LengthDisk Bytes/SecDisk Read Bytes/SecDisk Write Bytes/Sec
Scale Drop-down box that is used to select the scale of thechart.
Set Starts the plotting of the chart as per the selectedparameters.
Chart settings information
Path # The previously determined index number of the plottedpath, followed by its SCSI address:[Port.Path.Target.LUN].
Multiple plots, using different counters, can begenerated for the same path.
Counter The selected counter for the plot.
Scale The selected scale for the plot.
Color The color of the plot.
Device settings controls
7/27/2019 Hp Sure Store
48/70
48 HP Auto Path XP: Users Guide (Windows NT/2000)
Load Balancing PolicyDisplays the load balancing policy for the device. Thedrop-down list lets you choose from a list of policies;see Setting the load balancing policy (page 42).
Preferred Path Number(Displayed only when No Load Balancing is selected
for Load Balancing Policy.) Displays the index numberof the preferred path for the device. Select the preferred
path to a device from the drop-down list.
Set Applies the changes.
Cancel Cancels the operation.
If the Path Performance window is open, the Load Balancing Policy and
Preferred Path Number choice boxes for that device in the main window
(Device Settings) are disabled.
Saving chart settings
7/27/2019 Hp Sure Store
49/70
Operation 49
Saving chart settings
You can save the settings of a chart for future use using the Save ChartSettings option.
To save chart settings:
1. Select Save Chart Settings from the File menu.
The Save Chart Settings window appears.
Example
2. Enter a filename with the extension .app.
3. Select Save.
The chart settings are saved for future use. To open a chart settingsfile, see Opening and restoring chart settings (page 50).
Opening and restoring chart settings
7/27/2019 Hp Sure Store
50/70
50 HP Auto Path XP: Users Guide (Windows NT/2000)
p g g g
You can restore previously saved chart settings by opening a chart settingsfile. To create a chart settings file, see Saving chart settings (page 49).
To open a chart settings file:
1. Select Open from the File menu.
The Open Chart Settings File window appears.
Example
2. Select the desired chart settings file. Chart settings files use the
extension .app.
3. Select Open.
The chart settings are restored.
Removing a plot from the chart
7/27/2019 Hp Sure Store
51/70
Operation 51
g p
You can remove an unwanted plot from the chart using the Delete FromChart option.
To delete a plot from the chart:
1. Select the Path # of the plot you want to delete.
2. Select Delete From Chart from the Edit menu.
Example
The plot is removed from the chart.
Changing settings
7/27/2019 Hp Sure Store
52/70
52 HP Auto Path XP: Users Guide (Windows NT/2000)
You can change the vertical maximum of a chart using the Chart Settingsdialog box.
To change the vertical maximum of a chart:
1. Select Chart Settings from the Options menu.
The Chart Settings window opens.
Example
2. Enter the vertical maximum.
3. Select OK.
The new vertical maximum is applied.
Adapters window
7/27/2019 Hp Sure Store
53/70
Operation 53
The Adapters window lists all the Auto Path-capable adapters on the
system. This window is a view-only window, and there are no user-
configurable functions.
Example
The Adapters window displays adapter information:
Adapter # An index number used by Auto Path for identifying theadapter.
Adapter Name The name of the adapter.
Adapter State The state of the adapter:
Active The adapter is in use.
Failed The adapter has failed.
# of Paths The number of paths through the adapter.
Adapter SCSI Port #
7/27/2019 Hp Sure Store
54/70
54 HP Auto Path XP: Users Guide (Windows NT/2000)
Adapter SCSI Port #The adapter SCSI port number.
AdapterPathInfo window
7/27/2019 Hp Sure Store
55/70
Operation 55
The AdapterPathInfo window shows the details of the various paths
through the adapter. This window is a view-only window; there are no user-
configurable functions.
To access the AdapterPathInfo window, select an adapter under the
Adapters node in the tree view.
Example
The AdapterPathInfo window displays path information:
Path # An index number used by Auto Path for identifying thepath.
Path State The state of the path:
Active The path to the device is available
7/27/2019 Hp Sure Store
56/70
56 HP Auto Path XP: Users Guide (Windows NT/2000)
Active The path to the device is availablefor I/O.
Failed The path to the device is notavailable for I/O.
Port.Path.Target.LUNDisplays the physical path identifier.
Device Name The name of the device that the path leads to.
Device Serial # The serial number of the device that the path leads to.
Using Windows Performance Monitor
7/27/2019 Hp Sure Store
57/70
Operation 57
Windows Performance Monitor also allows you to create and view
performance charts for selected paths of a device. The charts can be used to
evaluate load balancing policy or preferred paths.
To create a path performance chart using Performance Monitor:
1. Start Windows Performance Monitor by selecting
Programs Administrative Tools Performance Monitor from the
Windows Start menu.The Performance Monitor window opens.
2. Select Add to Chart from the Edit menu.
The Add to Chart window appears.
3. Select HP Auto Path from the Object drop-down list.
The Instance box shows the paths to the devices on the disk arrays.The Counter box shows the list of counters.
4. To view descriptions of the available counters, click Explain.
5. Select the paths and counters that you want to view the performance
details for.
6. Select Add.
The program begins plotting the chart.
7/27/2019 Hp Sure Store
58/70
58 HP Auto Path XP: Users Guide (Windows NT/2000)
7/27/2019 Hp Sure Store
59/70
59
COMMAND-LINE INTERFACE
The Auto Path command-line interface (CLI) can be used only on hosts
connected to multipath-capable devices with the Auto Path driver installed.
The commands supported by this interface and the syntax are described
here:
autopath adapters (page 60)
autopath devices (page 61)
autopath help (page 62)
autopath paths device (page 63)
autopath set device (page 64)
You can execute Auto Path commands only from the directory where the
installed Auto Path program files reside.
To exit the DOS window, use the exit command.
If you chose the default directory when you performed the installation,
change the directory to C:\hpss\AutoPath, and then execute Auto Path
commands. If you chose a different directory during installation, change the
directory to the one you specified, and then execute Auto Path commands.
autopath adapters
autopath adaptersDisplay adapter names
7/27/2019 Hp Sure Store
60/70
60 HP Auto Path XP: Users Guide (Windows NT/2000)
Syntax autopath adapters
Description The autopath adapters command is used to display the various adapters inthe system.
Example HP Auto Path> autopath adapters
Adapter# Port# Adapter Name State # Paths1 2 HP HHBA5100x510xPCI Active 102 4 HP HHBA5100x510xPCI Active 4
autopath devices
autopath devicesDisplay devices
7/27/2019 Hp Sure Store
61/70
Command-line interface 61
Syntax autopath devices
Description The autopath devices command displays the details of the multipath-capable devices in the system.
Example
HP Auto Path> autopath devicesDevice # Device Name Serial No. State #Paths Policy1 HP OPEN-3 0400756000E2 Active 2 Shortest_Queue_ServiceTime2 HP OPEN-3 0400756000E3 Active 2 Round Robin
autopath help
autopath helpDisplay help
7/27/2019 Hp Sure Store
62/70
62 HP Auto Path XP: Users Guide (Windows NT/2000)
Syntax autopath help
Description The autopath help command opens the help for the autopath command-line interface supported commands.
Example
HP Auto Path> autopath helpDisplays details of HP Auto Path software supported devices/adaptersAUTOPATH DEVICES : Displays details of devicesAUTOPATH PATHS DEVICE=# : Displays details of paths to device#
(* at the end of a path signifies that it is thepreferred path)
AUTOPATH SET DEVICE=# PATH=# : Sets preferred path to device# as path#AUTOPATH ADAPTERS : Displays details of adaptersAUTOPATH SET DEVICE=# POLICY= : Sets load balance policy for device#
to
7/27/2019 Hp Sure Store
63/70
Command-line interface 63
Description The autopath paths device command displays the paths to the selecteddevice referenced by the device number.
Syntax autopath paths device=device_number
device_number The Auto Path index number shown in the autopathdevices command line display.
Example The device for this example has a defined load balancing policy.
HP Auto Path> autopath paths device=1Device Name: HP OPEN-3Device Serial Number: 0400756000E2Path# Controller Port# State Scsi Port# Bus# TID Lun#-------------------------------------------------------------------------
1 6 Active 3 4 0 02 22 Active 3 4 1 0
autopath set device
autopath set deviceSet load-balancing policy or preferred path
7/27/2019 Hp Sure Store
64/70
64 HP Auto Path XP: Users Guide (Windows NT/2000)
Syntax autopath set device=device_number{ policy=policy_name |path=path_number}
device_number The Auto Path index number shown in the autopathdevices command line display.
policy_name The load balancing policy name. For a list of load
balancing policies, see Setting the load balancingpolicy (page 42).
path_number The preferred path number.
Description The autopath set device command sets the load balance policy for thedevice specified by the device number.
If no load balancing is set for a device, the autopath set device command
sets the preferred path to the device.
Examples
HP Auto Path> autopath set device=1 policy=round_robinDevice Name: HP OPEN-3
Device Serial No. : 0400756000E2Change Load Balance policy (y/n) ? yLoad Balance policy changed. Verify by issuing "autopath" command
HP Auto Path> autopath set device=1 path=2Device Name: HP OPEN-3Device Serial No. : 0400756000E2Controller Port No. : 22Path Scsi Address : 3.4.1.0Change Preferred Path (y/n) ? yPreferred Path changed. Verify by issuing autopath command
7/27/2019 Hp Sure Store
65/70
65
TROUBLESHOOTING
Troubleshooting can be performed by the customer or an HP service
representative, depending on your HP service contract. If you are unable to
resolve an error condition, ask your HP service representative for
assistance.
Recovering after a failure
When a path fails, it is no longer used by Auto Path. After the path is
7/27/2019 Hp Sure Store
66/70
66 HP Auto Path XP: Users Guide (Windows NT/2000)
p , g y p
returned to normal, Auto Path automatically begins using the path with the
designated load balancing policy. No user action is necessary.
If there is no load balancing policy set for a failed path and the path was not
set as the preferred path, no user action is necessary.
If there is no load balancing policy set for a failed path and the failed path
was the designated preferred path, you must reset the recovered path as thepreferred path using the Device Settings window. See Setting the preferred
path (page 44).
Troubleshooting
To troubleshoot Auto Path, you can use these troubleshooting tools:
7/27/2019 Hp Sure Store
67/70
Troubleshooting 67
y g
Event Viewer
The Event Viewer logs path failovers/recovery, disk and adapter
errors, and I/O errors.
Windows Diagnostics
The Administrative Tools utility, accessed from the Windows Control
Panel, shows all devices connected to the Windows system.
Windows Registry
Caution Back up the Registry before executing the Registry Editor.
The Registry shows the devices connected to the Windows system.
The Registry Editor can be used to display the devices seen at boot
time.
Disk Administrator
Disk Administrator shows the paths that are online and offline. If all
the paths to a LUN appear to be offline, it is likely that the device is
not preformatted at the disk array level. Preformat the device, and the
Disk Administrator will see the path of the device and the remaining
paths offline.
Contacting HP customer service
If you call HP customer support, provide as much information about the
7/27/2019 Hp Sure Store
68/70
68 HP Auto Path XP: Users Guide (Windows NT/2000)
problem as possible, including the circumstances surrounding the error or
failure and the exact content of any error messages displayed on the host
system.
7/27/2019 Hp Sure Store
69/70
69
INDEX
AAbout window
description33
AdapterPathInfo window
description55
Adapters window
description53
autopath adapterssyntax description60
autopath devices
syntax description61
autopath help
syntax description62
autopath paths device
syntax description63
autopath set device
syntax description64
CChart Settings dialog box
description52
DDevice Settings window
description40
devices
adding39
Devices windowdescription37
refreshing information28
Diagnostic Message panel
description29
Disk Arrays window
description36
Eerrors
diagnostic message panel29
log file30
F
failoverautomatic8
Ggraphical user interface
starting20
HHBA
supported driver pairs9
help
accessing32
HP customer service
contacting68
Iinstallation
deinstalling17
procedure16
i 9
starting Auto Path GUI
how to20
T
bl h i
7/27/2019 Hp Sure Store
70/70
70 HP Auto Path XP: Users Guide (Windows NT/2000)
requirements9
Lload balancing
description7
load balancing policy
list42
setting42
Ppath performance chart
opening and restoring settings50
saving settings49
Path Performance window
description46paths
adding39
setting preferred44
Rrecovery
actions needed66
SServer Details window
description34
Server Settings window
description31
serversadding26
deleting27
Servers window
description24
troubleshootingHP customer support68
Wwarranty13
windows
About33
AdapterPathInfo55Adapters53
Device Settings40
Devices37
Disk Arrays36
Path Performance46
Server Details34
Server Settings31
Servers24
Windows Performance Monitor
using57