>
> Using 4mm DAT. Tapes used to fill up to almost 8 GB (compressed
> capacity).  Now they're filling up to almost 4 GB.
> I don't recall changing anything.
> Any advice, please?
> TIA
>

Maybe the data you're backing up has changed.  Files with high entropy will
not compress as well as those which are sparse.

Are you now doing backups of, say, JPEG imsges, or large binary data files?
Or, are you only getting this capacity with mostly text data.

Mark

--
============== See me at http://www.Tulane.EDU/~mjc ======================
============== See me at http://www.Tulane.EDU/~mjc ======================
Mark Justin Cecil    |  Tulane University    | mjc AT mailhost.tcs.tulane DOT 
edu
Systems Programmer   |   Computing Services  |     cecil AT eecs.tulane DOT edu
(504) 865-5631 x 2535|    New Orleans, LA    |  http://www.Tulane.edu/~mjc