For traditional snapshots, the snapshot plex is resynchronized from the data in the original volume during a vxassist snapback operation.
Figure: Resynchronizing an original volume from a snapshot shows an alternative where the snapshot overwrites the original volume.
Specifying the option -o resyncfromreplica to vxassist resynchronizes the original volume from the data in the snapshot.
The original volume must not be in use during a snapback operation that specifies the option -o resyncfromreplica to resynchronize the volume from a snapshot. Stop any application, such as a database, and unmount any file systems that are configured to use the volume.
For instant snapshots, the vxsnap restore command may be used to restore the contents of the original volume from an instant snapshot or from a volume derived from an instant snapshot. The volume that is used to restore the original volume can either be a true backup of the contents of the original volume at some point in time, or it may have been modified in some way (for example, by applying a database log replay or by running a file system checking utility such as fsck). All synchronization of the contents of this backup must have been completed before the original volume can be restored from it. The original volume is immediately available for use while its contents are being restored.