On Dec 9, 2004, at 9:21 AM, Dameon White wrote:

Does anyone know where or if you can change the block size for the mt
devices?  Via smit or chdev I can change the rmt devices, but no
matter what I set the rmt device block size to the mt devices are
built with a 1024 block size. ...

If you are talking about the context of TSM usage of tape drives: it
sets
the sizes itself, in conjunction with the appropriate device driver.
See IBM site Technote 1167281.

   Richard Sims