We have the same problem with the retension parameter. The feature seems not
to work as expected.
Since we used only backupsets on DASD's we had no problems with tapes...
Our environment : TSM 3.7.3.6 on MVS
With regards 
Stefan Holzwarth

> -----Ursprüngliche Nachricht-----
> Von: Maria Paz Gimeno [mailto:mpgimeno AT IBERCOM DOT ES]
> Gesendet am: Donnerstag, 2. November 2000 12:57
> An: ADSM-L AT VM.MARIST DOT EDU
> Betreff: Backupsets
> 
> I need help in the use of backupsets.
> The documentation says that after the days defined in the 
> retention period
> the backupset is deleted.
> In my customer this does not happen.
> We generate the backupset with retention=15 but the version 
> generated in
> October 1 is still there.
> We have manually deleted the versions we do not want, but the 
> volhistory
> entries for the backupset do not get deleted and we can not 
> reuse the tapes.
> They appear in the inventory as private, but the system does 
> not allow to
> update them manually to scratch.
> There in no way to remove the volhistory entries for 
> bakupsets, this is
> clearly stated in the reference manual:
> 
> "Use the DELETE BACKUPSET command to delete specified backup 
> set volume
> information in the volume history file. Do not use this 
> DELETE VOLHISTORY
> command to delete backup set volume information in the volume 
> history file."
> 
> What can we do to reuse the tapes? Is this a bug and the 
> entries should have
> been deleted automatically?
> We are using HP-UX 11.0 and TSM 3.7.3
> Thanks very much for any help
> Maria
>