POWER7 information

Replacing physical volumes in the storage pool

You can replace physical volumes in the storage pool by using the command-line interface on VIOS Version 2.2.1.3, or later.

When more storage space is needed in a storage pool you can also add or replace existing physical volumes in a storage pool. If you are replacing the existing physical volume with a physical volume that has a larger capacity, the capacity of the shared storage pool will increase.

Restrictions:

You can replace physical volumes only in one cluster at a time.
Do not use this task to only increase the capacity of the shared storage pool.

To remove and replace physical volumes in the storage pool, complete the following steps:

Remove and replace a physical volume that is currently in a storage pool by running the chsp command. For example,
```
chsp -replace -clustername clusterA -sp poolA -oldpv hdisk4 -newpv hdisk9
```
In this example, the hdisk4 physical volume is replaced by the hdisk9 physical volume in the storage pool. The replaced disk is returned to the free physical volume list.
Note: If the size of physical volume that is being replaced is large, the replace operation might take a longer time to complete.

To see the new set of physical volumes in the storage pool, run the lspv command. For example, entering the lspv -clustername clusterA -sp poolA command returns results similar to the following:

PV NAME                  SIZE (MB)       PVUDID   
---------------------------------------------------------------------------
hdisk0                   20485           200B75CXHW1031207210790003IBMfcp
hdisk1                   20495           200B75CXHW1031907210790003IBMfcp
hdisk8                   20500           200B75CXHW1031A07210790003IBMfcp
hdisk9                   20505           200B75CXHW1031A07210790003IBMfcp

Send feedback Rate this page

Last updated: Thu, April 05, 2018