How to Validate Normal or High Redundancy Diskgroups and ASM Disks Partnership
(Doc ID 1961372.1)
Last updated on AUGUST 05, 2021
Applies to:Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 10.2.0.1 to 22.214.171.124 [Release 10.2 to 12.1]
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Information in this document applies to any platform.
1) In ASM redundancy diskgroups, ASM protects against a double-disk failure, (which can lead to data loss) by mirroring copies of data on disks that are partners of the disk containing the primary data extent. A disk partnership is a symmetric relationship between two disks in a high or normal redundancy diskgroup, and ASM automatically creates and maintains these relationships. ASM selects partners for a disk from failure groups other than the failure group to which the disk belongs. This ensures that a disk with a copy of the lost disk’s data will be available following the failure of the shared resource associated with the failure group.
2) Therefore, this document provides the procedure and examples about how to validate Normal or High Redundancy Diskgroups and the ASM Disks Partnership.
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