Which statement describes the results of the snapmirror resync command?

The snapmirror resync command is used to repair a broken SnapMirror relationship. The command's function is to identify the most recent Snapshot copy that exists on both the source and destination volumes. It then reverts the destination volume to the state of this common Snapshot, effectively discarding any divergent data written to the destination since that snapshot was created. After this rollback, it proceeds to transfer only the incremental changes from the source that have occurred since the common snapshot, thereby re-establishing the mirror. This process is initiated on the destination cluster.

B: This is imprecise. Data loss is relative to the newest common snapshot, not necessarily the older original base snapshot.

C: The resync command does not modify or update snapshots on the source system; its purpose is to repair the destination.

D: This is an oversimplification. The command first rolls back the destination to a common snapshot before transferring new data; it doesn't just "update" a snapshot.

1. NetApp ONTAP 9 Command Reference: The manual page for the snapmirror resync command states

"The system finds the most recent Snapshot copy that the source and destination volumes have in common. The system...rolls back the data in the destination volume to the common Snapshot copy...After the rollback is complete

the system makes the destination volume a data protection volume and completes the resynchronization."

Source: NetApp ONTAP 9.8 Commands: Manual Page Reference

snapmirror resync section.

2. NetApp Technical Report (TR-4529): This guide explains the resynchronization process: "When a SnapMirror relationship is broken...you can resynchronize the relationship...ONTAP finds the last common Snapshot copy

rolls the destination back to that Snapshot copy

and then completes an incremental transfer from the source."

Source: NetApp TR-4529

"Data Protection Power Guide

" Section 5.1.3

"Resynchronizing a SnapMirror Relationship."

3. NetApp ONTAP Data Protection Administration Guide: This guide describes the scenario for using resync: "You can use the snapmirror resync command to resynchronize the destination volume with the source volume...The destination volume is reverted to the common Snapshot copy

and any data that was written to the destination volume after the common Snapshot copy was created is lost."

Source: NetApp ONTAP 9.10 Data Protection Administration Guide

"Resynchronize a broken SnapMirror relationship" section.