Hi,
The Full Backup and Inc Backup are the same object for TSM.

That mean if you backup the Full Backup with Managment Class A then backup 
Incremental with MG Class B, TSM will then change the FULL backup to MG Class B.

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson AT cristie DOT se
CPU2TSM Support: http://www.cristie.se/cpu2tsm-supported-platforms

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________________________________________
Från: Ehresman,David E. [deehre01 AT LOUISVILLE DOT EDU]
Skickat: den 22 februari 2012 14:20
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: What if

What if there were a

1)      storage pool with retonly=15 and retextra=15

2)      it received data from a backup node (NDMP) process

3)      the NDMP runs a full backup once every six months

4)      the NDMP run an incremental monthly on the months a full is not run

What data does TSM actually retain?

David