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