HP StorageWorks Enterprise Virtual Array Cluster FIO Starter Kit Uživatelská příručka stáhnout pdf (Strana 154)

4. Click Create New Virtual Disk and a processing message appears, as shown on the following

screen.

5. After the virtual disk and volumes are created successfully, the volumes can be discovered as

back-end LUs with HP Command View SVSP as shown below.

6. Create a storage pool using the MSA back-end LUs. Use this pool to create SVSP virtual disks

based on your requirements.

Adding HP XP arrays

Define each DPM and VSM as a host. The host mode should be set to Windows, host mode 0C.

To prevent an issue where pools with LUNs of HP XP arrays go into a partial state and some LUNs in

the HP Command View SVSP GUI are marked as failed, create a pool for the HP XP LUNs, but only

place one instance of each LU in the pool. Sometimes the VSM interprets each path to an HP XP LU

as a separate LU. For example, if there are 4 connected XP host ports, and 8 LUNs presented through

those 4 ports, there can be 32 entries on the VSM Back-End LUs panel. When one LU is added to a

pool, the duplicate entries are removed, and the Access Path tab for the HP XP LUs contain the expected

paths.

The reason this issue exists is that when a LUN is added to a pool, the VSM writes a signature to it.

If the VSM reads that same signature on other LUs, it knows that LU is actually an additional path,

and the paths are coalesced.

Another important issue with XP-like arrays is to make sure that the number of spindles supporting the

disk being presented are sufficient for the performance requirements. For example, it is possible to

create volumes with only two spindles.

Adding arrays to the EVA Cluster154

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HP StorageWorks Enterprise Virtual Array Cluster FIO Starter Kit Uživatelská příručka Strana 154