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

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


Cause:


The diskgroup could not be mounted by the ASM instance because it was operating in a lockspace different than another existing ASM instance which had already mounted the diskgroup.



Action:


Check the LOCK_NAME_SPACE initialization parameter value, or dismount the diskgroup from the other ASM instances.