Oracle Message ORA-15292 - Disk name string is being used by another disk

ERRORDisk name string is being used by another disk
CAUSEThe specified disk name could not be reused because an 11.1.0.6.0 or earlier database instance had it cached in memory.
ACTIONDo one of the following - Specify a different name for the disk. - Wait for the rebalance to complete successfully. - Identify the database instance with the problem and shut it down before retrying the command.