*BSD News Article 86381


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: aha 1522A today, 2940UW a month later
Date: 6 Jan 1997 23:57:29 GMT
Organization: Private BSD site, Dresden
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Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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jca@bighorn.accessnv.com (J.C. Archambeau) wrote:

> Most likely yes, you will have to backup and reformat the drive.  I
> suspect the 1522A and the 2940UW have differing translation schemes.

Not necessarily.  I'm not sure about the 1522, but if it allows for
``DOS > 1 GB'' translation (63 sectors per virtual track, 256 virtual
heads), it should also work with the AHA2940.

Btw., if the disk is installed in ``dangerously dedicated'' mode (*),
the actual translation shouldn't matter at all.

(*) That's what you get by saying ``A)ll FreeBSD'' in the partition
editor, but answering the next question about remaining compatible
with other operating systems with ``No'', regardless of how many nasty
dragons you're being promised. ;-) Basically, it drops BSD on your
disk starting straight at sector 0, so the BSD bootstrap acts as the
master boot record.  The only geometry assumption in this mode is that
your translation allows for at least 15 sectors in a single track (the
size of the bootstrap itself).

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)