The simple answer is that you have to provide scratch tapes, else your TSM system will be crippled. Look around your system. Examine the Activity Log for the past week. Find out what has been happening to your scratch tapes. Look particularly for lots of tape volumes in Filling status and in ReadOnly state, where that is commonly caused by a faulty tape drive generating I/O errors. If tapes look healthy, then you may have a capacity planning issue in accommodating data influx growth.
Richard Sims
