Bug 26910716: Disk Group Unmounted After Offlining Disks with already one of failgroup dismounted
(Doc ID 2434330.1)
Last updated on FEBRUARY 19, 2019
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 and later
Information in this document applies to any platform.
Offlining another failgroup with already offlined failgroups results in diskgroup dismount .
Offlining multiple failgroup leads to reduced number of quorum concensus. So, ASM dismount the diskgroup.
SQL> alter diskgroup <DISKGROUP_NAME> offline disks in quorum failgroup Qfg
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15315: Write errors in disk group <DISKGROUP_NAME> could lead to inconsistent ASM metadata.
We need to reject offlining of new failgroup to keep diskgroup mounted.
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