*BSD News Article 46489


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Newsgroups: comp.unix.bsd.freebsd.misc
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.sprintlink.net!howland.reston.ans.net!Germany.EU.net!nntp.gmd.de!nntp.darmstadt.gmd.de!news.th-darmstadt.de!hrz-ws11.hrz.uni-kassel.de!phase23!citylink.dinoex.sub.org!peter
From: peter@citylink.dinoex.sub.org (Peter Much)
Subject: Re: Grateful and Humble Newbie Questions
Organization: Buero fuer Sektenforschung und Qualitaetspruefung in der Esoterik
Message-ID: <DBBqG4.1n8@citylink.dinoex.sub.org>
References: <kargl-0507950950270001@128.95.97.183> <1995Jul5.194753.27248@schbbs.mot.com>
Date: Fri, 7 Jul 1995 02:19:16 GMT
Lines: 30

In article <1995Jul5.194753.27248@schbbs.mot.com>,
Ron Feigen <ronf@phx.sectel.mot.com> wrote:
>FreBSD and DOS can co-exist but if you have a IDE or E_IDE drive
>larger than 1024 cylinders (503Meg) you are going to have to say
>bye-bye to all tracks past 1024.  In other works if you have a 1.6 meg
>Western Digital you are going to have to be happy addressing only
>503 meg, even in DOS.

WROOOOOONGGGGG!!! The right answer would be: 500MB **ONLY** in DOS!
FreeBSD, like any OS with some clue, will happily use all of Your disk
in this configuration - just tell the mainboard config all of the
cylinders of Your disk and not only 1023, and swith off all LBA stuff.
FreeBSD will use all cylinders - only DOS (and the root-Partition of
FreeBSD, for booting!) won't work beyond 1023.

>Does anybody know if/when FreeBSd will support E-IDE or heads > 16?

I don't see why this should hurt. FreeBSD can use disks up to 4095 cyls.
DOS cannot, due to a BIOS misconception. So there is an ugly hack done,
in hiding the unaddressible tracks thru larger (non-existing!) head-num-
bers. Unix-like OS don't need such a hack and likely won't boot correct-
ly with such a hack.
Since unix-like OS can use the whole disk (possibly reserving ~480MB
for DOS) without the ugly hack, i can see no reason why one should re-
implement the hack.

Peter
-- 
  Write to:  Peter Much * Koelnische Str. 22 * D-34117 Kassel * +49-561-774961
 peter@citylink.dinoex.sub.org  much@hrz.uni-kassel.de   p.much@asco.nev.sub.de