This seems to be a hot topic, so let me add another log to the fire.

We recently upgraded our test TSM AIX server to AIX 5.1.  Then we upgraded
the TSM server to 5.2.0.0.

Unfortunately, I missed the part about having to upgrade ATAPE to 8.2.x
(it was still at 7) *BEFORE* upgrading TSM.

Therefore, the 3590 drive isn't being recognized by TSM (AIX says it is
peach-keen).

Upgraded ATAPE to 8.3.x, but still no joy in Mudville !!!  Even tried
removing and reinstalling the ADSM/TSM drivers.

How do you resolve this ?

Will upgrading TSM to 5.2.1.3 (yes, we discovered you must upgrade to
5.2.1.x before you can install 5.2.1.3 !!) correct this oversight ?