To continue a SnapMirror relationship after reverting a volume with an older snapshot, which command should be used?

To continue a SnapMirror relationship after reverting a volume with an older snapshot, which command should be used?

• A. SnapMirror initialize
• B. SnapMirror quiesce
• C. SnapMirror update
• D. SnapMirror resync

Answer: (D)

When a source volume is reverted to an older snapshot, the SnapMirror pair can become out of sync. To bring the destination back into exact alignment with the source, you perform a resync. This uses the existing SnapMirror relationship to re-create the destination’s data to match the source’s current state, effectively re-synchronizing the mirrors. Initialization would start the copy from scratch, which isn’t needed here since the relationship already exists. Update would only apply changes since the last transfer and might miss the broader changes caused by the revert. Quiescing is about pausing I/O for backups, not restoring alignment after a revert. So the correct action is resync.

When a source volume is reverted to an older snapshot, the SnapMirror pair can become out of sync. To bring the destination back into exact alignment with the source, you perform a resync. This uses the existing SnapMirror relationship to re-create the destination’s data to match the source’s current state, effectively re-synchronizing the mirrors.

Initialization would start the copy from scratch, which isn’t needed here since the relationship already exists. Update would only apply changes since the last transfer and might miss the broader changes caused by the revert. Quiescing is about pausing I/O for backups, not restoring alignment after a revert. So the correct action is resync.