HP StorageWorks 2000 Series Reference Manual page 118

You can delete snapshots at any time, including when:
The associated snap pool is reaching capacity and you want to free some space
The maximum number of snapshots is reached and you want to delete older
snapshots
You no longer need the data associated with the snapshot
To delete a snapshot:
1. Unmount the snapshot from hosts.
2. Select Manage > Volume Management > Snapshot Services > Delete Snapshot.
For each virtual disk, the virtual disk panel shows a status icon; the name, RAID
level, size, number of disk drives, and number of volumes; and utility status, if any.
3. Select a virtual disk.
The selected virtual disk's volume names, sizes, and types are displayed, and the
amount of free space.
4. Select the snapshot to delete.
5. Click Delete Snapshot.
When processing is complete, the snapshot is removed from the Volume Menu
panel. All data uniquely associated with the snapshot is deleted and associated space
in the snap pool is freed for use.
To view information about all snap pools, master volumes, and snapshots:
1. Select Manage > Volume Management > Snapshot Services > Snapshot Overview.
For each virtual disk, the virtual disk panel shows a status icon; the name, RAID
level, size, number of disk drives, and number of volumes; and utility status, if any.
2. Select a virtual disk.
The selected virtual disk's volume names, sizes, and types are displayed, and the
amount of free space.