HP 3PAR Application Software Suite for Oracle - Manual (Page 126)

3. Back up the binary control file from the cloned database and prepare to rollback the virtual
copy.
a.
Issue the RMAN command to backup the control file in the cloned database while the
database is in the Mounted state.
RMAN> backup current controlfile format '/tmp/clone_control';
RMAN> shutdown immediate;
b. Connect to the +ASM instance on the remote backup server pe2950-24 and then unmount
the related ASM diskgroups used by the cloned database.
alter diskgroup ASM11GR2_DATADG dismount;
alter diskgroup ASM11GR2_DATADG2 dismount;
alter diskgroup ASM11GR2_ARCHDG dismount;
alter diskgroup ASM11GR2_ARCHDG2 dismount;
126 Case Study: Remote Copy with Recovery Manager for Oracle