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Date:      Thu, 30 Jul 1998 20:11:38 +0100
From:      "Ralf Folkerts" <folkerts@ibm.net>
To:        "malte.lance@gmx.net" <malte.lance@gmx.net>
Cc:        "FreeBSD-Questions@FreeBSD.org" <FreeBSD-Questions@FreeBSD.ORG>
Subject:   Re: DDS-II Drive and Hardware-Compression
Message-ID:  <199807301811.SAA104710@out2.ibm.net>

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On Thu, 30 Jul 1998 15:21:42 +0200 (CEST), Malte Lance wrote:

Hi Malte,

don't know where I had my eyes or what I have been looking for; since it's datcompr for IBM 
AIX and Linux maybe I looked for that and didn't see anything else :-((((

However, what does the phrase re. the kernel mean?? Does it mean I can set 
Dat-Compression with comp 1 but the drive won't be switched to that mode? What does the 
kernel have to do with this, as this simply should "just" be a scsi-command (like mode-select) 
on the device??

Do you know more??

Well, thanx for pointing my eyes on this!!!!


_ralf_

>Ralf Folkerts writes:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > 
> > Hi,
> > 
> > I have a question re. a DDS-II Streamer (ARCHIVE  Python 28388-XXX 4.CM) and 
> > Hardware-Compression:
> > 
> > With OS/2's GTAK I can use "compr on" to turn on my Drive's Hardware-Compression. With 
> > Linux I use "mt -f /dev/rmt0 datcompression on" to activate it.
> > 
> > However, the FreeBSD mt command does not offer direct access to the 
datcompression-flag. 
> > Instead it offers me three "X.nn" Modes to select from.
>
>On my 2.2.6-system "man mt" gives:
>...
>     comp       Set compression mode.  (The kernel counterpart of this has not
>                yet been reported to work correctly.)
>...
>
>What system are you on ?
>
>Malte.
>
> > 
> > Unfortunately I absolutely don't know which mode corresponds to the "datcompr on" Flag. 
I 
> > also read the Manual and searched the FAQs and Mailing-List-Archives but didn't find a 
clue.
> > 
> > Could anybody please let me know *what* mt - mode I have to select in order to have my 
Drive 
> > use it's Hardware-Compression?!
> > 
> > MTIA,
> > _ralf_
> > 
> > PGP Public Key Fingerprint = D5 69 E2 6E EF 76 FC 8F  B0 1A 56 77 BB F9 58 15
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> > 
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-questions" in the body of the message
>

PGP Public Key Fingerprint = D5 69 E2 6E EF 76 FC 8F  B0 1A 56 77 BB F9 58 15

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