On Thu, 29 Nov 2001 at 4:48pm, Mike Hogsett wrote
> define tapetype AIT-SDX1-25C-NOHWC {
> length 24192 mbytes
> filemark 0 kbytes
> speed 4051 kps
> }
> define tapetype AIT-SDX1-25C-HWC {
> length 21504 mbytes
> filemark 0 kbytes
> speed 3606 kps
> }
>
Thanks for posting these! (If it's working, you should also be able to
add them to the FAQ-O-Matic.)
Just so you realize, though (you may already), the tape length returned by
tapetype using hardware compression is meaningless. Tapetype writes
random data to the tape, which doesn't compress well. As you can see, it
actually takes up *more* tape when "compressed". To use hardware
compression with amanda, take the NOHWC value and multiply it by a
realistic estimate of compression ratio, then use that for the length
value. E.g., I use an AIT1 drive with SDX1-35C tapes, for which tapetype
told me 33077 mbytes. In my tapetype, I use 50000 mbytes. I haven't hit
EOT yet.
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
