A fibre drive looks just like a SCSI drive to TSM.  We implemented 3590s on
TSM 4.1 on Windows 2000 without any problem on the same adapters as Shark
(in a McData fabric), but this configuration is not officially supported,
only because it has not completed the testing.

There are some caveats.  You must have the right stuff implemented in your
adapters and this is very specific to the hardware you are using (HBAs and
tape drives).  You need to get the recommended configuration from the tape
vendor.

The real question is are you going to do SAN Agents and Tape/Library
Sharing?