Drop a file from diskgroup

Syntax

ALTER DISKGROUP diskgroup_name DROP FILE ‘filename’, ‘filename’..;

Note: ASM drops all the aliases associated with the filename.

Example 1

SQL> Alter Diskgroup ASMDATA DROP FILE ‘+ASMDB/gcprod/datafile/users.259.661355087’ , ‘+ASMDB/gcprod/datafile/sysaux.257.661355085’;

Thanks