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Creating extra backup Snapshot copies for SnapMirror qtrees

You might want to create an extra backup Snapshot copy on the source and destination in a qtree SnapMirror relationship. You can create a manual Snapshot copy using the snap create command. Then, you can use the -c and -s options of the snapmirror update command together to establish an extra backup Snapshot copy on both sides of a SnapMirror qtree relationship.

About this task

These Snapshot copies can serve as the newest common Snapshot copy in case a base Snapshot copy is accidentally deleted. You can also use them to resynchronize a SnapMirror qtree relationship to an earlier resynchronization point.

Steps

  1. Enter the following command:snap create vol_name snapshot_name
    vol_name is the name of the volume whose Snapshot copy you want to create.

    snapshot_name is the name of the Snapshot copy.

    Example
    systemB> snap create vol2 my_snap
    This creates a Snapshot copy, my_snap, of the volume vol2.
  2. Enter the following command:snapmirror update -S source -s src_snap -c dest_snap destination
    source is the name of the source.

    src_snap is the name of the Snapshot copy on the source.

    dest_snap is the name of the Snapshot copy on the destination.

    destination is the name of the destination.

    Example
    systemA> snapmirror update -S systemB:/vol/vol2/qtree1 -s my_snap -c my_dest_snap vol/vol4/qtreeSafe