How do you verify a SnapMirror relationship is healthy?

• A. Check only last transfer time.
• B. Review event logs on the destination only.
• C. Run a VM snapshot.
• D. Use the SnapMirror status commands or System Manager to confirm last transfer, lag, and health of the relationship.

Answer: (D)

Verifying SnapMirror health means checking the actual replication status plus how current the destination is. The key indicators are when the last transfer occurred, how far behind you are (the lag), and whether any errors are present. Using the SnapMirror status commands or System Manager gives you these metrics in one place: last transfer time, lag, and the health state of the relationship. This direct view of the relationship provides an accurate picture of its health, rather than relying on irrelevant data. Checking only the last transfer time misses lag and ongoing issues; inspecting logs on the destination alone can miss problems on the source or during transfer; and a VM snapshot doesn’t assess SnapMirror health at all.