Hi, Jeanne Case,

on Mittwoch, 01. Oktober 2003 at 23:54 you wrote to amanda-users:

JC> I recently installed a Dell PowerVault 110T 320 SDLT tape drive. I was
JC> not able to find a tapetype for this unit. So I ran the amtapetype test.
JC> My question is if I plan on using this drive with hardware compression
JC> on, should I still run the amtapetype test with the hardware compression
JC> off?

Why would you want to run the tape with hardware compression ON ?
ItŽs recommended to run Amanda without the hardware compression on,
because Amanda can predict tape usage much better without hw
compression. So think about it twice.

Browse the list archives, there are many posts about that.

And regarding your question:

Lookup the docs/TAPETYPES file. It says (about using amtapetype):

> Make sure you
> do not use hardware compression, even if you plan to use hardware
> compression in the future.  `tapetype' writes random data to tape, and
> random data will expand instead of compressing, therefore you'll get
> an estimate that's smaller than expected.

-- 
best regards,
Stefan

Stefan G. Weichinger
mailto:monitor AT oops.co DOT at