ORA-15112: no diskgroups currently mounted

admin

ORA-15112: nodiskgroups currently mounted
Cause: An ALTER DISKGROUP ALL command did not find anymounted
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.
Action: Mountthe diskgroups on which you wish to operate or ignore the error.