Which two statements are true about the UNDROP clause of the ALTER DISKGROUP statement?
A.
It cancels pending drops of disks dropped using the DROP DISKGROUP command.
B.
A disk cannot be undropped as a result of a drop diskgroup.
C.
It automatically unmounts the disks after successfully undropping them.
D.
It is not possible to cancel pending drops of disks dropped using the force option.
Explanation:
The UNDROP DISKS clause of the ALTER DISKGROUP statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP
statement, or for disks that are being dropped using the FORCE clause. https://docs.oracle.com/cd/B28359_01/server.111/b31107/asmdiskgrps.htm
The UNDROP DISKS clause of the ALTER DISKGROUP statement enables you to cancel all
pending disk removal operations within disk groups. Pending disk removal operations include those currently in progress.
This statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP statement, or for disks that are being dropped using the FORCE clause.
If a drop disk operation has already completed, this statement cannot be used to restore it. In this case, you can simply add the dropped disk back to the disk group to achieve the same outcome.
B & D
Agree,
Correct B,D
A, not D:
The UNDROP DISKS clause of the ALTER DISKGROUP statement enables you to cancel all pending drops of disks within disk groups.
B:
This statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP statement, or
for disks that are being dropped using the FORCE clause.
A&B
No, A is absolutely wrong…
“This statement cannot be used to restore disks that are being dropped as the result of a DROP DISKGROUP statement, or for disks that are being dropped using the FORCE clause.”
As you can see A said “DROP DISKGROUP command”…
Source:
http://docs.oracle.com/cd/B28359_01/server.111/b31107/asmdiskgrps.htm#CHDFBFGC
D81242GC10 Oracle Database 12c: ASM Administration 4-37
Correct: B,D
Your are right. B,D correct.