On Thu, 12 Jun 2003 at 9:41am, Bill Nolf wrote

> I have a HP-DAT 40 that should get 40GB with hardware compression.

Ha, yeah right.  Marketers lie.  This depends *heavily* on your data.

> I ran amtape type and got the following.
> 
> length 16534 mbytes
> filemark 0 bytes
> speed 2570 kbytes
> 
> Does this look right?  The first run didn't come close to 40gb or even 20gb.

You had hardware compression enabled.  tapetype puts out random data.  The 
two don't like each other.

Run tapetype again without hardware compression, and you'll get something 
close to 20.  If you'll be using software compression, put that value in 
your amanda.conf.  If you'll be using hardware compression, guess how 
compressible your data is, adjust the length accordingly, and continue 
doing so if you hit EOT too often.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University