Last updated on SEPTEMBER 11, 2017
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 188.8.131.52 [Release 10.2 to 12.1]
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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