How SnapMirror replication works

You can configure a SnapMirror relationship and request a mirror update. SnapMirror then coordinates with SnapDrive to reflect the incremental changes of the source volume on the destination volume.

With SnapManager 3.0 for Microsoft Exchange and later, after the SnapManager backup is complete, the mirror update request is delayed until SnapManager explicitly requests it. If you do not want to update the SnapMirror destination volume after a backup, you can override the update by using the Backup wizard or the Backup and Verify window.

The following process describes SnapMirror destination replication:

You configure a SnapMirror relationship between source volumes and destination volumes.
Create a Custom schedule with schedule parameters (“- - - - -“). Initialize the mirror to perform initial transfer of contents from a source volume to a destination volume.
You select the “Update SnapMirror after operation” option for the operation.
If any volume whose data is captured in the backup is a SnapMirror source volume, SnapDrive requests information about all SnapMirror destination volumes for the source volume.
SnapDrive sends a SnapMirror destination update request to all the related destination volumes.
SnapMirror updates the destination volumes to reflect incremental changes on the source volume.