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
