If you performed a TSM restart, examine the Activity Log around that
time, as TSM should perform a full inquiry of the library then, and
you will see detailed results, and any problems, in the logging.
This is healthy to check, regardless of anything else.

And, as always, fully check out new equipment at the OS level before
putting such under the control of an application such as TSM.

Use DISABLESCheds Yes and NOMIGRRECL server options to suppress
server busy work.  And do DISAble SESSions.

   Richard Sims