You must run this command as root.
The file_name variable can be a file name or the name of an Oracle ASM disk group. For example:
/oradbocfs/crs/data.ocr
d:\oracle\mirror.ocr
+olddg
If you specify an Oracle ASM disk group, then the name of the disk group must be preceded by a plus sign (+).
The only configured Oracle ASM OCR location, which is on a different Oracle ASM disk group than the Oracle ASM OCR backup location, cannot be removed.