9.5.01 HP P4000 SAN Solution User Guide (AX696-96168, February 2012)

Managing snapshot temporary space
You can either delete the temporary space to free up space on the cluster, or, if you need data
that may have been written to the temporary space, convert that temporary space to a SmartClone
volume.
Convert the temporary space to access data
Convert the snapshot temporary space if you have written data to a mounted snapshot and you
need to permanently save or access that data. Converting the temporary space creates a SmartClone
volume that contains the original snapshot data plus any additional data written after the snapshot
was mounted.
Prerequisites
Stop any applications that are accessing the snapshot, and log off all related iSCSI sessions
To convert the temporary space:
1. Right-click the snapshot for which you want to save the additional data.
2. Select Convert Temporary Space from the menu.
3. Enter a name for the volume and an optional description.
4. Click OK.
The temporary space becomes a volume with the name you assigned. The original snapshot
becomes a clone point under the new volume. For more information about clone points, see
“Rolling back a volume to a snapshot or clone point” (page 173).
5. If you converted temporary space from an application-managed snapshot, use diskpart.exe
to change the resulting volume's attributes.
For more information, see “Making a Windows application-managed snapshot available”
(page 171).
Delete the temporary space
The snapshot temporary space is deleted when the snapshot is deleted. However, you can manually
delete the snapshot temporary space if you need to free up space on the cluster. Note that if you
have written any data to the snapshot, that data will be deleted along with the temporary space.
If you want to save that data, convert the temporary space to a volume.
Prerequisite
Stop any applications that are accessing the snapshot, and log off all related iSCSI sessions.
To delete the temporary space:
1. In the navigation window, select snapshot for which you want to delete the temporary space.
2. Right-click, and select Delete Temporary Space.
A warning message opens.
3. Click OK to confirm the delete.
Rolling back a volume to a snapshot or clone point
Rolling back a volume to a snapshot or a clone point replaces the original volume with a read/write
copy of the selected snapshot. Rolling back a volume to a snapshot deletes any new snapshots
that may be present, so you have some options to preserve data in those snapshots.
• Instead of rolling back, use a SmartClone volume to create a new volume from the target
snapshot. This volume gets a new name and the target snapshot becomes a clone point, shared
Rolling back a volume to a snapshot or clone point 173