> Thanks for the info Steven.  Based on what we are seeing, I'd say that's
> incredible!  Particularly the 019A11 tape.  Maybe I have a different
> problem.  All of the tapes I have, including those that are scratch, have
> been written in the 3570 uncompressed format.  Now that I have changed
> the devclass to 3570 compressed, do I need to reinitialize the tapes that
> were previously written to as uncompressed?  I have been told by two
> other sources that I would not have to do anything to the tapes to get
> them to record in compressed format other than make sure they're scratch
> when they get written.  Any ideas?  Shaun

I have never written anything except for compressed, so I am not sure.
However, my guess would be that you would have to relabel, but like I
said, that is just a guess.

> Average data on All  3570 tapes (MB/tapes) = 21415626.7/1425 =
>   15028.51MB
> Average data on Full 3570 tapes (MB/tapes) = 20855129.6/1363   =
> 15300.90MB
> Average data on Vaulted 3570 tapes (MB/tapes) = 11539106.2/746 =
> 15467.97MB
> Average data on non-DEPT 3570 tapes (MB/tapes) = 8657613.3/570 =
> 15188.79MB
> Average data on Primary  DEPT tapes (MB/tapes) = 1218907.2/109 =
> 11182.63MB
> Average % in use of Full 3570 tapes                            =  52.99%
>
> Tape with least data:
> 249203 DEPT_TAPE    3570DEPT      6,178.1   27.0    Full
>
> Tape with most  data:
> 019A11 BACKTAPE     3570TAPE     55,072.9   48.6    Ful
>
> I get less compression on the "DEPT" tapes because those are personal
> desktop machines, not servers, and those users tend to tar-n-compress
> stuff to save disk space.
>
> 019A11 most likely has an Oracle database on it.
>
> Steve (unVMix Systems Programmer/Dude) Roder
> (tkssteve AT ubvm.cc.buffalo DOT edu | tkssteve AT acsu.buffalo DOT edu | 
> (716)645-3564
> ,
>    | http://ubvm.cc.buffalo.edu/~tkssteve)
>
>


Steve (unVMix Systems Programmer/Dude) Roder
(tkssteve AT ubvm.cc.buffalo DOT edu | tkssteve AT acsu.buffalo DOT edu | 
(716)645-3564 ,
   | http://ubvm.cc.buffalo.edu/~tkssteve)