You can create an Oracle ASM Dynamic Volume Manager (Oracle ADVM) volume in a disk group. The volume device associated with the dynamic volume can then be used to host an Oracle ACFS file system.
The compatibility parameters COMPATIBLE.ASM and COMPATIBLE.ADVM must be set to 11.2 or higher for the disk group. See "Disk Group Compatibility Attributes".
The ALTER DISKGROUP VOLUME SQL statements enable you to manage Oracle ADVM volumes, including the functionality to add, modify, resize, disable, enable, and drop volumes. The following are examples of the ALTER DISKGROUP VOLUME statement.
If the volume is hosting an Oracle ACFS file system, then you cannot resize that volume with the SQL ALTER DISKGROUP statement. Instead you must use the acfsutil size command. For information, see "acfsutil size".
For information about Oracle ADVM, see "Overview of Oracle ASM Dynamic Volume Manager". For information about managing Oracle ADVM volumes with ASMCMD, see Managing Oracle ADVM with ASMCMD . For information about managing Oracle ADVM volumes with ASMCA, see "ASMCA GUI Tool for Managing Oracle ACFS and Oracle ADVM".
The ALTER DISKGROUP SQL statement in the Oracle Database SQL Language Reference
Example 4-5 Managing volumes with ALTER DISKGROUP VOLUME statements
SQL> ALTER DISKGROUP data ADD VOLUME volume1 SIZE 10G; Diskgroup altered. SQL> ALTER DISKGROUP data RESIZE VOLUME volume1 SIZE 15G; Diskgroup altered. SQL> ALTER DISKGROUP data DISABLE VOLUME volume1; Diskgroup altered. SQL> ALTER DISKGROUP data ENABLE VOLUME volume1; Diskgroup altered. SQL> ALTER DISKGROUP ALL DISABLE VOLUME ALL; Diskgroup altered. SQL> ALTER DISKGROUP data DROP VOLUME volume1; Diskgroup altered.