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How to find out the backup header of a disk in Normal redundancy asm diskgroup (Doc ID 3016293.1)

Last updated on APRIL 22, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Information in this document applies to any platform.

Goal

 Starting with ASM version 12.1, ASM replicates the physically addressed metadata in AU11. This means that ASM maintains two copies of the ASM disk header, Free Space Table and the Allocation Table.

One copy in AU0 and backup copy in AU11 of each Disk.

This needs the compatible.asm attribute to be set to 12.1 or higher and phys_meta_replicated to be TRUE as well.

e.g.

Solution

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In this Document
Goal
Solution

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