On Wed, Feb 12, 2003 at 03:37:40PM -0800, John Oliver wrote:
> On Wed, Feb 12, 2003 at 06:05:03PM -0500, Joshua Baker-LePain wrote:
> > If you want to continue using software compression (let's amanda be more 
> > accurate), then turn off compression at your tape drive.
> 
> For the life of me, I can't find how to disable hardware compression.
> Drive is a Quantum TH5AA DLT 4000.  I found the Product Manual on
> Quantum's site, and it mentions that you *can* disable compression, but
> neglects to say how.  Nothing I can find does :-(

Varies with drive and operating system.

Common ways include device selection (eg. on Solaris /dev/rmt/0ln vs 
/dev/rmt/0cn
where the "c" indicates compression), by cmd (mt command on Linux and others?),
by front panel switch, or by internal dip switch to set and lock the state at
power up.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
 4455 Province Line Road        (609) 252-0159
 Princeton, NJ  08540-4322      (609) 683-7220 (fax)