Using backup and standby service for SnapVault

You can set up SnapMirror backup and standby protection for the SnapVault secondary storage system.

Steps

1. Use the license command to confirm that the SnapVault secondary storage device has both SnapVault secondary storage and SnapMirror features licensed.
2. Use the license command to confirm that the SnapMirror destination device has both the SnapVault secondary storage and SnapMirror features licensed.
3. Set up SnapMirror replication from the active SnapVault secondary storage system to a disk-based destination device (another storage system or NearStore system).

4. If the active SnapVault secondary storage system is damaged or destroyed, convert the SnapMirror destination device to an alternate SnapVault secondary system to carry on the task of backing up data from the primary storage systems.

   Example

   You have the following configuration: systemA (primary) has a SnapVault backup to systemB (secondary) and systemB has a SnapMirror backup to systemC (tertiary). If systemB fails, break the SnapMirror backup between SystemB and SystemC, and re-create the SnapVault relationship such that systemA has a SnapVault backup to systemC.

5. After evaluating the reason for the data loss or corruption, either return the secondary storage system to the path as a tertiary storage system or add a new storage system as tertiary storage.

   After adding systemB, you will have the following configuration: systemA (primary) has a SnapVault backup to systemC (secondary) and systemC has a SnapMirror backup to systemB (tertiary). If you added a new storage system, it would replace systemB in the configuration.

6. As an optional step, you might want to return the storage systems to their original configuration.

• Re-creating the SnapVault relationship
  The original configuration in the following procedure is a SnapVault relationship between systemA: /vol/vol1/qtree3 and systemB:/vol/vol2/qtree3 with the SnapVault destination volume systemB:vol2 backed up to another volume on a third storage system, systemC:vol3.
• Adding back the tertiary storage system SnapMirror backup
  Depending on the kind of backup interrupt you encountered, the old secondary storage system might be usable again as the tertiary storage system or you might need to assign a new system.
• Returning storage systems to the original configuration
  This is an optional procedure because you might not have a need to return the backup configuration to the original systemA to systemB to systemC configuration.