Great,

Thanks a lot.  I'm reading TSM doc as I respond to TSM issues.

We've moved a client server from a UNIX based TSM to a TSM(4.2.1.9) started
task running  on OS/390 v2r9.  Now backups take a LOT more time. Where do I
begin to look for the why?

I see extended IDLE waits.
  1,162 BPX--  IdleW  2.0 H   76.2 M   4.4 K Node  WinNT

What causes idle wait?