HP Storage Mirroring V5 Software - Manual (Page 110)

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Automatic Snapshots
Storage Mirroring snapshot capability is enabled by default for those servers running Windows 2003. In order to protect your
data on the target, Storage Mirroring automatically takes snapshots at certain times. When Storage Mirroring transitions from
a good state to a bad state, it will automatically attempt to take a snapshot of the data before it leaves the good state and
enters the bad state. For example, if your data is in a good state and you start a mirror, before the mirror is started, Storage
Mirroring will automatically take a snapshot of the target. (Snapshots are not taken before the initial mirror when a connection
is established.) In the event the mirror fails to complete, you will have a snapshot of the data on the target when it was in its
last good state. After the target moves from the bad state back to a good state, the snapshot is automatically deleted since it
is no longer needed.
Only one automatic snapshot per connection is maintained on the target. When an automatic snapshot is taken, it replaces
any previous automatic snapshots.
Scheduled Snapshots
You can schedule snapshots of your target data to fit your environment and needs. If the target data is in a bad state at the
time of a scheduled snapshot, the snapshot will be delayed until the data on the target reaches a good state. If multiple
scheduled snapshots are delayed, only one snapshot will be taken when the data reaches a good state.
1. Right-click the connection on the right pane of the Management Console and select Connection Manager .
2. Select the Snapshot tab. (Since snapshot functionality is limited to Windows 2003 Service Pack 1 or later, you will not
see the Snapshot tab if the target is Windows 2003 or earlier.)
3. Select Enable Scheduled Snapshots .
4. Specify when snapshots should be taken, indicating minutes, hours, or days. The snapshots should be at least 15 minutes
apart. By default, a snapshot is taken every hour.
5. Specify if you want the snapshots to start immediately. Otherwise, enter a date and time for when the snapshot schedule
will begin.
6. Click OK to save the settings.
Manual Snapshots
You can manually take a snapshot of the data on the target at any time. If an automatic or scheduled snapshot is currently in
progress, Storage Mirroring will wait until that one is finished before taking the manual snapshot. Right-click the connection
and select
Snapshot Now .