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How To Move The Database To Different Diskgroup (Change Diskgroup Redundancy) (Doc ID 438580.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.1 to 12.1]
Oracle Database - Standard Edition - Version to [Release 10.1 to 12.1]
Oracle Database - Enterprise Edition - Version to [Release 12.1]
Oracle Database - Enterprise Edition - Version to [Release 12.2]
Information in this document applies to any platform.


Automatic Storage Management (ASM) is an integrated file system and volume manager expressly built for Oracle database files.

This note is applicable :

1. If you wish to move to different ASM storage / Hardware.
2. If you wish to change the redundancy of the diskgroup

When the diskgroups are created with some redundancy say External,Normal or High then its redundancy cannot be changed. Need to change redundancy can arise if :

- DBA's want to switch from Normal/High Redundancy to External Redundancy due to disk space constraints or due to plans of using External methods of maintaining redundancy (like RAID 10 , etc) .

- Switch to ASM based Redundancy i.e converting from External redundancy to Normal/High Redundancy

This note discusses the steps to change the redundancy of existing diskgroups in ASM.

Note : - Please note that this steps have been tried and tested internally. But we would suggest users to test the steps in a Test Environment before executing them in Production.

Also having a Full Cold Backup for the database is recommended.


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