*BSD News Article 54441


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: HD geometry woes..
Date: 12 Nov 1995 15:51:58 +0100
Organization: Private FreeBSD site, Dresden.
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Brent Mosbrook (ZyXEL) <brentm@hydra.sdsc.edu> wrote:

>(using 2.05R)
>I've got an Adaptec 1542 w/ 2.10 bios, and a Microp 1528 (1.3GB SCSI)
>It says during the partitioning that the "correct" geometry is 4369x12x50
>all attempts to alter this yield an "incorrect geometry" msg.

The correct geometry for an Adaptec is XXXX * 32 * 64, with XXXX being
the number of megabytes for your drive (rounded down to the nearest
megabyte boundary).

You cannot really ``turn off'' translation for a SCSI controller,
since SCSI does only know absolute block addressing, so *any*
``geometry'' (as seen from outside) is a translated one.
-- 
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. ;-)