How can you reverse the effects of an ALTER DISKGROUP … DROP DISK command if it has already
completed?
A.
Issue the ALTER DISKGROUP … ADD DISK command.
B.
Issue the ALTER DISKGROUP … UNDROP DISKS command.
C.
Issue the ALTER DISKGROUP … DROP DISK CANCEL command.
D.
Retrieve the disk from the Recycle Bin after the operation completes.
Explanation:
You cannot UNDROP DISKS if the DROP DISK command has already completed.