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Operational Steps for Recovery after Losing a Disk Group in an Exadata Environment (Doc ID 1339373.1)

Last updated on FEBRUARY 27, 2019

Applies to:

Oracle Exadata Hardware - Version and later
Oracle Exadata Storage Server Software - Version and later
Information in this document applies to any platform.


Oracle recommends using High Redundancy Disk groups to provide the highest level of data protection and availability for mission critical applications, however different settings may be chosen for less critical applications. This document will discuss various scenarios of partner disks (disks in different cells containing mirrored copies of the same extent) and diskgroup losses, highlight some of the error messages associated with diskgroup or ASM disk partner loss and provide methods of recovery or mitigation.


The information in this document applies to Exadata Storage Server Software 11g Release 2 (11.2) and higher, Oracle Grid Infrastructure 11g Release 2 (11.2) and higher and Oracle RDBMS 11g Release 2 (11.2) and higher.  Although it is recommended that earlier releases follow the same guidelines, behavior and error messages can be different in those earlier releases.


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