HP StorageWorks SAN Virtualization Services Platform Manager user guide (5697-0295, January 2010)

5 Working with back-end LUs
Virtualization Services Manager (VSM) detects all back-end logical units (LUs) that the SAN presents
to the VSM server. The VSM client can display all LUs with capacity greater than 100 MB as back-end
LUs.
NOTE:
The HP Enterprise Virtual Array only builds LUs of 1 GB or greater.
In order to manage back-end LUs under VSM, you must first place them in a storage pool. For
information about configuring back-end LUs as members of storage pools, see
“Working with storage pools” on page 79.
If a back-end LU already contains data before you bring it under VSM management, you need to
import the back-end LU data to a VSM virtual disk. This import operation configures the back-end LU
as a member of a storage pool and makes the back-end LU and its data fully manageable by VSM.
VSM enables you to monitor the access paths through which back-end LUs are detected. SAN storage
systems have primary and secondary controllers running active-active and active-passive firmware.
Therefore, you can monitor failovers of a back-end LU from a primary controller to a secondary
controller in a storage system, and you can switch the back-end LU back to its primary controller after
fixing a problem that caused a failover.
You can:
• View the Back-End LUs list
• View back-end LU information
• Rescan the SAN for back-end LUs
• Import back-end LU data to a VSM virtual disk
• Perform fail back
• Refresh access paths
• Rename back-end LUs
• Run back-end LU diagnostics
Viewing the Back-End LUs list
The Back-End LUs list displays all back-end LUs detected by the VSM server that have capacities greater
than 1 GB.
To view the Back-End LUs list:
1. In the navigation tree, expand the Entities node.
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