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I have created long time back one ASM RAC setup and I created one diskgroup with some name say xyz. I think that instance is gone but the diskgroup was not dropped exclusively using command:

drop diskgroup xyz including contents;

Now that I have created a new setup and want to re utilize these disks, I am getting below error:

CREATE DISKGROUP XYZ EXTERNAL REDUNDANCY DISK ...

ORA-15003: diskgroup "xyz" already mounted in another lock name space

How can this diskgroup be removed? Any help is appreciated.

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  • 1
    Are you still interested?
    – Ste
    Commented May 28, 2013 at 18:37
  • Why can't you drop it now? Commented Mar 21, 2014 at 14:52

1 Answer 1

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Check the diskgroup status in both instances. If it is showing mounted in both instances then:

  1. dismount the diskgroup in all the instance except one. For instance, if you have a 3 node RAC setup, then dismount the diskgroup in nodes 2 and 3.
  2. Drop the diskgroup from the 1st node.

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