Which MetroCluster configuration procedure is recommended for re-establishing a mirrored
volume that was in a level-0 resynchronization state when it failed?

A.
Determine which volumes are at the remote and disaster sites.

B.
Re-create the synchronous mirror.

C.
Rejoin the two volumes.

D.
Turn on power to the cluster node at the disaster site.

Explanation:
https://library.netapp.com/ecmdocs/ECMP1210206/html/GUID-A865DB95-9418-4ED2-A993-74F347F674A0.html

1. Validate that you can access the remote storage by entering the following command:
aggr status -r
Note: A (level-0 resync in progress) message indicates that a plex cannot be rejoined.
2. Turn on the power to the node at the disaster site. After the node at the disaster site boots up, it
displays thefollowing:
Waiting for giveback…(Press Ctrl-C to abort wait)
3. If the aggregates at the disaster site are online, take them offline by entering the following
command for eachaggregate that was split:
aggr offline disaster_aggr
disaster_aggr is the name of the aggregate at the disaster site.
Note: An error message appears if the aggregate is already offline.
4. Destroy every target plex that is in a level-0 resync state by entering the following command:
aggr destroy plex_name
5. Re-create the mirrored aggregates by entering the following command for each aggregate that
was split:
aggr mirror aggr_name -v disaster_aggr
aggr_name is the aggregate on the surviving site’s node.
disaster_aggr is the aggregate on the disaster site’s node.
The aggr_name aggregate rejoins the disaster_aggr aggregate to reestablish the
MetroClusterconfiguration.
6. Enter the following command at the partner node:
cf giveback
The node at the disaster site reboots.