I think you've hit the nail on the head Richard.
KEEPMP is set to NO, and we set MountRet to 2 mins - with only 4 drives we
need those vols out as quick as possible.

My solution is to set the storage pool to have only one scratch volume -
in the last 2 years of backing up these SQL machines we haven't got more
than 18% of a volume, so I think we'll be OK with that one vol for a bit.

Much appreciated.
Matthew




Richard Sims <rbs AT BU DOT EDU>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
03/08/2005 17:03
Please respond to
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


To
ADSM-L AT VM.MARIST DOT EDU
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Subject
Re: [ADSM-L] More tapes used than necessary






You may be running into the Filling problem, as described in ADSM
QuickFacts.
Your KEEPMP and MOUNTRetention values may cause TSM to dismount the
recently
written volume. But if a volume is dismounting, TSM will shrug its
shoulders
and call for a scratch to be mounted - ostensibly because it's faster
than
waiting for a full dismount-store-retrieve-remount tape sequence.

   Richard Sims





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