Oracle Error Message
ORA-15112: no diskgroups currently mounted
Reason for the Error
An ALTER DISKGROUP ALL command did not find any mounted diskgroups upon which to operate. Either instance shutdown or an ALTER DISKGROUP ALL DISMOUNT command did not dismount any diskgroups, or an ALTER DISKGROUP ALL UNDROP DISKS command did not undrop any disks.
Solution
Mount the diskgroups on which you wish to operate or ignore the error.
