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:

Symptoms

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.

Changes

Cause

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