Hi,
That is probably because you only have 2 or 3 partitions on your server you try 
to backup.
TSM can only stream 1 session per local partition on the client.

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson AT cristie DOT se
Skype: cristie.christian.svensson
________________________________________
Från: ADSM: Dist Stor Manager [ADSM-L AT VM.MARIST DOT EDU] för Robert 
Ouzen Ouzen [rouzen AT UNIV.HAIFA.AC DOT IL]
Skickat: den 19 juli 2009 12:40
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: Deduplication  number of sessions

Hi to all



I am testing now Data Deduplcation wit Data Domain , my TSM server version is 
5.5.2.0 . In my pilot environment I have node with the maxnummp option of 20 
and still the backup open only 3 sessions.



The Device type of the device class is FILE with mountlimit of 20



Any ideas ???



Regards Robert