HP StorageWorks 2300 Modular Smart Array reference guide (500911-001, January 2009)

60 Provisioning the system
Creating a snapshot
You can create a snapshot now or schedule the snapshot task.
NOTE: The first time a snapshot is created of a standard volume, the volume is converted to a master
volume and a snap pool is created. The snap pool's size is 20% of the volume size or 10 GB, whichever is
larger. Before creating or scheduling snapshots, verify that the vdisk has enough free space.
To create a snapshot now
1. In the Configuration View panel, right-click a volume and select Provisioning > Create Snapshot.
2. In the main panel, select Now.
3. Optionally change the default name for the snapshot. A snapshot name is case sensitive and cannot
already exist in a vdisk. A name cannot include a comma, double quote, or backslash.
4. Click Create Snapshot. If the task succeeds, the snapshot appears in the Configuration View panel.
To schedule a create snapshot task
1. In the Configuration View panel, right-click a volume and select Provisioning > Create Snapshot.
2. In the main panel, select Scheduled.
3. Set the options:
• Snapshot prefix. Optionally change the default prefix to identify snapshots created by this task. The
prefix is case sensitive and cannot include a comma, double quote, or backslash. Automatically
created snapshots are named prefix_s001 through prefix_s1023.
• Snapshots to Retain. Select the number of snapshots to retain. When the task runs, the retention
count is compared with the number of existing snapshots:
• If the retention count has not been reached, the snapshot is created.
• If the retention count has been reached, the volume's oldest snapshot is unmapped, reset, and
renamed to the next name in the sequence.
• Start Schedule. Specify a date and a time in the future for the schedule to start running.
• Date must use the format yyyy-mm-dd.
• Time must use the format hh:mm followed by either AM, PM, or 24H (24-hour clock). For
example, 13:00 24H is the same as 1:00 PM.
• Recurrence. Specify how often the task should run. It is not recommended to set the interval to less
than two minutes.
• Time Constraint. Specify a time range within which the task should run.
• Date Constraint. Specify days when the task should run.
• End Schedule. Specify when the task should stop running.
4. Click Schedule Snapshots. If processing succeeds, the schedule is saved and can be viewed in the
overview panel for the volume or system.
Deleting a snapshot
When you delete a snapshot, all data uniquely associated with that snapshot is deleted and associated
space in the snap pool is freed for use. Snapshots can be deleted in any order, irrespective of the order in
which they were created.
CAUTION: Deleting a snapshot removes its mappings and deletes its data.
To delete a snapshot
1. Verify that hosts are not accessing the snapshot that you want to delete.
2. In the Configuration View panel, right-click a snapshot and select Provisioning > Delete Snapshot.