HP StorageWorks 8000 NAS - Manual (Page 105)

Managing Your Storage 103
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Scheduling a Snapshot
On the Snapshots Scheduler page, a table displays the following information
for each scheduled snapshot on the NAS server:
■ File volume name of the snapshot
■ Snapshot name
■ Size allocated to the snapshot
■ Auto grow enabled
■ SNMP trap percentage
■ Frequency of re-occurrence of the snapshot
■ Expiration date of the snapshot
When you schedule a snapshot, make sure your NAS server will have
sufficient space to accommodate the snapshot. (The system does not pre-
allocate space and assumes that space will be available at the time the
snapshot is scheduled to take place.) If space is not available on the volume
group at the time the snapshot is scheduled to occur, the snapshot will fail. To
ensure that you have sufficient space, you can view the Volume Groups page.
To create a scheduled snapshot:
1 In the Command View NAS web interface, click the Storage tab.
2 Navigate down the tree to Snapshots, then select Snapshot Scheduler.
3 Select Actions > Create New Scheduled Snapshot.
4 Select the file volume you want to take a snapshot of from the File Volume
drop-down list.
5 Enter a Snapshot Name.
6 Enter the maximum size for the snapshot volume in the Snapshot Capacity
field. A snapshot cannot exceed the file volume size.
7 In the Snapshot Capacity Policy box, select either:
— Auto Grow at and select a percentage from the drop-down list to
allow the snapshot to grow automatically if it is almost full.
Note: Remember, after the snapshot has been taken, when a file
changes, the original file (at the time the snapshot is taken) is copied to
the snapshot volume. So, for every file that changes, snapshot capacity
is consumed. You want to specify a large enough capacity so that an
original copy of all files that change is saved, but not so large that the