Slimdave,
VJ did not say he is using EMC BCV. I see 2 reasons:
1. When a tablespace is put into begin backup mode, Oracle will do "slow checkpoint". I think scanning 29 GB SGA to look for dirty blocks may consume a lot of time. Instead of that I will do "fast checkpoint" by executing "alter system checkpoint" command.
2. The "gap" in tablespace numbers. Later I think that this may not be issue.
Tamil
