SnapMirror Snapshot copies stored on either the SnapMirror source or destination location must not be deleted. If the base Snapshot copy (most common Snapshot copy) is accidentally deleted from either the source or destination location, you can attempt recovery.
As long as there is at least one Snapshot copy common to both the source and the destination, resynchronization will succeed.
If there is no Snapshot copy common to both the source and the destination, you need to use the snapmirror initialize command over the network. Or, if the source and destination are volumes, you must use the smtape backup command to store the source volume on tape and then use the smtape restore command to restore the volume from the tape to the destination.
For more information about smtape commands, see the Data ONTAP Data Protection Tape Backup and Recovery Guide for 7-Mode.