PRACTICAL EXERCISE

During this exercise you will carry out the following tasks using the RAID Group Management and Volume Management functions:

Assign a Hot Spare Logical Device Expansion (adding a disk to a RAID Group) LUN Concatenation (adding capacity to an existing LUN from a RAID Group with unused disk space) Delete a RAID Group RAID Migration (moving Volume to an existing RAID Group with enough unused disk space) Writing conventions .................................................................................. 1 Assign a Hot Spare ................................................................................... 2

Disk Overview .......................................................................................... 3 Logical Device Expansion ........................................................................ 4 LUN Concatenation ................................................................................... 6 Preparations for the next step ................................................................. 9

Delete a RAID Group ............................................................................... 9 RAID Migration ........................................................................................ 10

Create a new RAID Group ..................................................................... 11 Start RAID Migration .............................................................................. 11

Writing conventions

This symbol points out hazards that can lead to non-functional configurations, data loss, equipment damage or even personal injury

This symbol followed by smaller text highlights important background information and tips

Text output = [Text output] is used to show screen content of a character based display <Date> = "smaller than" and "greater than" signs are used to show variables which are to be replaced by actual values. "Menu Item"= Commands, menu items, names of buttons, options, variables, file names and path names. [Key] = Keyboard input is shown in square brackets.

ETERNUS DX60 S2

Exercise Management Advanced

Exercise number 6

Objective Assign a Hot Spare, Logical Device Expansion, LUN Concatenation, RAID Migration

Target time 90 minutes

Release September 2011

Pages 14

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The following assumes that the exercise "Management Basic" has been executed prior to this exercise and that the user is logged in as user "root".

1) As the first step of this exercise, we will look at the Storage System Status. There is one more disk available - Disk 3 - but not yet configured. In the next steps we will assign this disk as a Dedicated Hot Spare for RAID Group 0.

Assign a Hot Spare

2) From the "RAID Group Management" menu, choose the option "Assign Hot Spare".

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3) Choose the following settings for the Hot Spare: Hot Spare Type: Dedicated Hot Spare

(The Hot Spare will only be used for the given RAID Group)

Select an existing RAID Group: RAID Group 0 (consisting of disk 0 through 2)

4) On the right hand side of the screen choose disk 3 by clicking on the check box. Click on "Assign" to continue and click "OK" as a confirmation.

Disk Overview

5) From the Storage System Status, click on "Disks" on the tree structure on the left, the Information box provides an overview of the disks in the system

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6) By clicking on "Disk#3" on the left, in the Information box or on the picture above the Information box, detailed information about the disk number 3 is shown.

7) In the next step we want to do expand an existing RAID Group. As we don't have any more free disks in the system, we will release the Hot Spare.

8) From the "RAID Group Management" menu, choose "Release Hot Spare".

9) In our case we can go and choose the disk by ticking on the tick box to choose which Hot Spare to release. If there was several Hot Spares in the system, one could tick first on "Specify RAID Group" to see which disk is associated with which RAID Group. Proceed by clicking on "Release" and confirm with "OK".

Logical Device Expansion

10) Next we want to increase the capacity of the RAID Group 0 by adding a disk to it. From the "RAID Group Management" menu, choose the option "Logical Device Expansion".

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11) In the next step we select the RAID Group and click on "Next" to continue.

12) At this point we could also choose to change the RAID Level of the existing RAID Group to better suit the situation with one additional disk. We will not change the RAID Level and choose to add the Disk 3 to this RAID Group by selecting it with the tick box. Click on "Next" to continue.

13) Click "Start" and confirm with "OK" to start the Expansion.

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14) From the "RAID Group Status" we can see that the Expansion is ongoing and that the capacity of the RAID Group 0 has increased from 838144 MB to 1257216 MB.

15) As the last step we will go and change the Name of the RAID Group 0 by choosing "Set RAID Group Name" from "RAID Group Management" menu. Change the Name from "RAID5 D0-D2" to "RAID5 D0-D3". Click on "Set" and confirm with "OK". For the next task we need a system with more than eight disks, or we need to reuse some of the existing disks. Therefore in our case we will in the next step delete the RAID Group 1 so that we can try out further features of the ETERNUS DX60 S2.

LUN Concatenation In this chapter we will add capacity to an existing LUN from a RAID Group with unused disk space. In "real life" this function is useful if a particular Volume is becoming full and the ETERNUS DX has unused capacity in its existing RAID Groups. With "LUN Concatenation" it is possible to add capacity "on-the-fly", without any interruption to the users.

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16) Next we want double the capacity of the Volume 1 of the RAID Group 0 from 2,048 GB to 4,096 GB.

17) From the "Volume Management" menu, choose the option "LUN Concatenation".

18) From the next screen choose the Volume 1 (D0-D2 Volume 1)

19) Choose the Volume 1 and click on "Next".

20) Under "Specify source of additional capacity" we can choose with the drop down list an existing RAID Group and see how much unused capacity exists, if any. Choose the following settings: RAID Group: 0:RAID5 D0-D3 (notice

the changed name) Capacity (MB): 2048 (this is the

capacity we want to add to Volume 1). Click on "Add".

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21) The capacity to be added to Volume 1 is shown on the top of the screen with the yellow background. Click on "Concatenation" and confirm with "OK" to start the process.

22) From "RAID Group Status" we can see that the capacity of the Volume 1 has increased to 4096 MB.

23) Now check how the server sees the Volumes.

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Preparations for RAID Migration Following chapters "Delete a RAID Group", "Create new RAID Groups", "Create Volumes" and "LUN Mapping" are preparations for the last two features of the ETERNUS DX60 S2 that we will have a look at: "LUN Concatenation" and "RAID Migration".

Delete a RAID Group

Warning: Do not proceed with this exercise in the case you are planning to do the exercise "MPIO", which assumes that the RAID Group 1 exists in the system in its current form.

24) The goal of this step is to delete the RAID Group 1, but as the Group has active Volumes, the deletion needs to be done from "back to front", meaning we need to delete the LUN Mapping first.

25) Go to "RAID Group Status" menu to check which Volumes are created on the RAID Group 1: Volumes 2 and 3.

26) From the "Host I/F Management" menu, choose the option "Configure LUN Mapping".

27) From the next screen check which Ports are mapped with Volumes 2 and 3: CM#1 Port#1.

28) Click on "Edit".

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29) On the next screen, delete the entries from LUN numbers 2 and 3. Click on "Set" and confirm with "OK".

30) Next go to "Delete Volume" and tick on the check boxes for Volume 2 and 3. Click on "Delete" and confirm with "OK".

31) Go to "Delete RAID Group" and tick on the check box for Group 1. Click on "Delete" and confirm with "OK".

RAID Migration The "real life" situation for the RAID Migration functionality could be for example when LUN Concatenation can no longer be used to add capacity to existing Volumes because there is no unused capacity in the existing RAID Groups.

Fujitsu Technology Solutions Page 11 / 14 Fujitsu ETERNUS DX60 S2 Practical Exercises Management Advanced We can still add capacity "on-the-fly" - without any interruption to the users - by adding disks to the system, and then moving the existing "full" Volume or Volumes on these new, larger capacity disks. This is the starting point for this chapter: there are four new disks in the ETERNUS DX, disks four through seven.

Create a new RAID Group

32) Create a new RAID Group using all the currently available disks (D4 through D7). Create RAID Group 1: RAID Group Number: 1 RAID Group Name: RAID5 D4-D7 RAID Level: RAID5 Assigned CM: 1

33) As a result the "RAID Group Status" should look like the screen shot on the right. In the next chapter we will move the existing Volume 0 on the RAID Group 0 to this larger capacity RAID Group 1.

Start RAID Migration

34) Choose "RAID Migration".

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35) Choose Volume 0 as the Source Volume and click on "Next". Please note that Volume 1 is grayed out because a concatenated Volume cannot be used for RAID Migration.

36) For the Destination Volume, choose RAID Group 1 and click on "Next".

37) Choose 1406592 - half of the total capacity of RAID Group 1 - for the New Volume Capacity and click on "Next".

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38) To start the RAID Migration, click on "Migration" and confirm with "OK".

39) From "Volume Status" we can see that: Volumes 0 and 2 are being migrated Volume 2 is being formatted

40) At this point it would make sense to rename both Volume 0 and Volume 1 to show the changed disk configuration: Rename Volume 0 as "D4-D7 Volume

0" Rename Volume 1 as "D0-D3 Volume

1"

41) As the last step of this exercise, a screen shot from the server.

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CEMEA&I Fujitsu Technology Solutions Fujitsu Training Academy training@ts.fujitsu.com http://training.ts.fujitsu.com

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Quiz

QUESTION 1: In step 30, why is it not possible to choose Volumes 0 and 1?

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QUESTION 2: In step 39, which LUN Mapping remains active: Volume 0 or Volume 2?

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QUESTION 3: After the Migration is completed, what happened to Volume 2?

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QUESTION 4: What needs to be done to get the new Volume 0 to be visible to the server?

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