10.5 HP StoreVirtual Storage User Guide (AX696-96269, March 2013)

Table 50 Requirements for changing volume characteristics (continued)
Requirements for ChangingItem
The cluster must have sufficient storage systems and
unallocated space to support the new data protection level.
Data protection level
For example, you just added more storage to a cluster and
have more capacity. You decide to change the data
protection level for a volume from Network RAID-0 to
Network RAID-10 to ensure you have redundancy for your
data.
Before changing the size of a volume, refer to “Changing
the volume size on the server” (page 156)
To increase the size of the volume:
Size
• If you have enough free space in the cluster, simply
enter the new size
• If you do not have enough free space in the cluster,
delete volumes and/or snapshots, or add a storage
system to the cluster
To decrease the size of the volume (not recommended):
• You must shrink the file system on the volume before
shrinking the volume in the CMC, if the volume has been
or is mounted by any operating system
• Do not decrease the size of the volume below the size
needed for data currently stored on the volume
CAUTION: HP recommends that you do not decrease the volume size. If you shrink the volume
in the CMC before shrinking it from the server file system, your data will be corrupted or lost.
To edit a volume
1. In the navigation window, select the volume you want to edit.
2. Click Volume Tasks and select Edit Volume.
Changing the volume description
1. In the Description field, edit the description.
2. Click OK when you are finished.
Changing the cluster—migrating a volume to a different cluster
Editing the volume to change the cluster causes the volume to migrate to the target cluster. The
LeftHand OS software allows the online migration of volumes between storage clusters in the same
management group. This migration can be used to manage both storage capacity and performance
between clusters. For example, move a large volume from Cluster A to Cluster B to free up space
in Cluster A, or improve the performance of a volume by moving it from a cluster of MDL-SAS
storage systems to a cluster of 15K SAS storage systems.
See Table 50 (page 161) for the requirements for migrating a volume.
162 Using volumes