Carolyn,
You did nt specify server platform etc in your query.
However you could use some external scheduler to issue Modify
commands to the ADSM server to update storage pools to
RECLAIM=100 at 5pm and and back to whatever level you normally
have set at 5am.
This is the method I use.
Chris Morris            Chris.Morris AT natpower DOT com
This represents the view of the author alone, and is not be be
considered as the position of National Power Plc.