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volume snapshot restore

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Restore the volume to a snapshot.

Availability: This command is available to cluster and Vserver administrators at the admin privilege level.

Description

The volume snapshot restore command restores a Snapshot copy to be the read-write parent volume for the volume family. This replaces the current working copy of the volume with the Snapshot copy that results in a loss of all changes made since the Snapshot copy was created.

Note You should manually update all the SnapMirror relationships of a volume immediately after you restore its Snapshot copy. Not doing so can result in unusable SnapMirror relationships that must be deleted and re-created.

Before running this command on an Infinite Volume, unmount the volume. Any namespace mirror constituents present in the system are resyncronized to the restored Snapshot copy.

After the restore is complete, the size of the flexible volume will be set to either the current volume size or the snapshot size - whichever is greater.

Parameters

-vserver <vserver name> - Vserver

This specifies the Vserver that contains the volume on which the specified Snapshot copy to be restored is saved.

-volume <volume name> - Volume

This specifies the parent read-write volume whose Snapshot copy is to be restored to take its place.

-snapshot <snapshot name> - Snapshot

This specifies the Snapshot copy that is to be restored to be the read-write parent volume.

[-force <true>] - Force Restore

If you use this parameter, the Snapshot copy is restored even if the volume has one or more newer Snapshot copies which are currently used as reference Snapshot copy by SnapMirror. If a restore is done in this situation, this will cause future SnapMirror transfers to fail. The SnapMirror relationship may be repaired using snapmirror resync command if a common Snapshot copy is found between the source and destination volume. If there is no common Snapshot copy between the source and the destination volume, a baseline SnapMirror copy would be required. If you use this parameter, the operation is also allowed on application tagged volumes.

[-preserve-lun-ids {true|false}] - Preserve LUN Identifiers

This option enables you to select whether the Snapshot copy restore needs to be non-disruptive to clients due to LUN identifiers changing. If you use this option and set it to true , or choose to not use this option at all, the volume snapshot restore command fails if the system determines that it cannot be non-disruptive with regards to LUN identifiers. If you use this option and set it to false , the restore operation proceeds even if this might cause client-visible effects. In this case, administrators should take the LUNs offline before proceeding.

Examples

The following example restores a Snapshot copy named vol3_snap_archive to be the parent read-write volume for the volume family. The existing read-write volume is named vol3 and is located on a Vserver named vs0:

cluster1::> volume snapshot restore -vserver vs0 -volume vol3
-snapshot vol3_snap_archive