Hum, I'm a bit confused here... I read somewhere that it was not
trivial to disable hardware compression. I have an autoloader with a
DAT 72 drive, connected to a linux server. The command mt
datcompression 0 Compression off does not seem to work.

I read that the hardware compression flag was written on the tape, and
to disable it I had to "clear" that bit in all tapes. Is this true?
How can I do that?

I also read that there was non-documentated dip switch settings on the
drive that could disable hardware compression. I have a HP DAT
72x6. The manuals just states the correct dip switch settings for each
operating system. Any way I could get the info on what exactly each
dip switch does?

Cheers,

Rodrigo

-- 

*** Rodrigo Martins de Matos Ventura <yoda AT isr.ist.utl DOT pt>
***  Web page: http://www.isr.ist.utl.pt/~yoda
***   Teaching Assistant and PhD Student at ISR:
***    Instituto de Sistemas e Robotica, Polo de Lisboa
***     Instituto Superior Tecnico, Lisboa, PORTUGAL
*** PGP fingerprint = 0119 AD13 9EEE 264A 3F10  31D3 89B3 C6C4 60C6 4585