Hp XP P9500 Storage User Manual download pdf (Page 141)

Configure LU paths workflow

Defining LU paths includes the following tasks:

• “Defining LU paths” (page 141)

• “Setting a UUID” (page 141)

• “Defining alternate LU paths” (page 143)

Defining LU paths

In a fibre channel environment, you must define LU paths and associate host groups with logical

volumes. For example, if you associate a host group consisting of three hosts with logical volumes,

LU paths are defined between the three hosts and the logical volumes.

When you use a logical volume larger than 2 TB, whether the host can access that logical volume

depends on the operating system of the host. The following operating systems support a logical

volume that is larger than 2 TB.

• AIX 5.2 TL08 or later

• AIX 5.3 TL04 or later

• Windows Server 2003 SP1 or later

• Red Hat Enterprise Linux AS 4 Update 1 or later

If you use an operating system other than these, make sure that a logical volume is not larger than

2 TB. For information about the maximum logical volume capacity supported by your operating

system, contact the vendor of your operating system.

Procedure 23 To define LU paths

1. From the Storage Systems tree, click Ports/Hosts Groups. From the Actions menu, select Logical

Device, and then Add LUN Paths.

2. Select the desired LDEVs from the Available LDEVs table, and then click Add.

Selected LDEVs are listed in the Selected LDEVs table.

3. Click Next.

4. Select the desired host groups from the Available Host Groups table, and then click Add.

Selected host groups are listed in the Selected Host Groups table.

5. Click Next.

6. Confirm the defined LU paths.

• To change the LU path settings, click Change LUN IDs and type the LUN ID that you want

to change.

• To change the LDEV name, click Change LDEV Settings. In the Change LDEV Settings

window, change the LDEV name.

7. Click Finish.

8. In the Confirm window, confirm the settings, in Task Name type a unique name for this task

or accept the default, and then click Apply.

If Go to tasks window for status is checked, the Tasks window opens.

Setting a UUID

You can set an arbitrary ID to identify a logical volume from the host using LUN Manager with

host mode option 33 on. This ID is called the UUID (user-definable LUN unit identifier).

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Hp XP P9500 Storage User Manual Page 141