From the TSM Server issue: q node <node name> f=d
check the maxnump. If its 1 the node can only have one mount point. To change this, from the TSM Server, update node <node name> maxnump=2
This will give the node 2 mount point, if you want more could set it to the number of drives that you have in the tape library.
From the TSM Client issue:
incr <path/*> <- This is one session to tape #1.
Once this session is started, start another TSM Client session and then issue </path2/*> <- This is #2 session to tape #2.
For the above to work, the data need to be going to the tape pool.
Good Luck,
Sias