Steps 1 and 2 are the same as in the Same-host FlashSnap procedure (One server)section:

1) Using Snap Prepare to attach a snapshot mirror to the original volume

2) Detaching the snapshot mirror and creating a new volume that is associated with it.

Because no remote host is involved, you do not need to use the Disk Group Split and Join commands. The backup or other resource-intensive processing is done on the same server.

In both the off-host and same-host procedures, the final step is to join the mirrored volume back to its original volume, using the Snap Back command. In this step, the time for synchronizing the mirrors is greatly reduced.

FlashSnap on the same host can also be used for quick recovery snapshots to recover data. Quick Recovery is the process of using on-host point-in-time copies of production data and a transaction log to recover a database that has been corrupted or that has missing data. If a database becomes corrupted, for example, you could reload the original data from the most current snapshot, and then use the transaction log to bring the database current to the point before the corruption.

For a general discussion of Quick Recovery, see the Quick Recovery section of the Storage Foundation and High Availability Solutions Solution Guide. For detailed information, refer to the Quick Recovery Solutions guide for the respective application.