*BSD News Article 33887


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Newsgroups: comp.sys.ibm.pc.hardware,comp.os.msdos.misc,comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msuinfo!agate!doc.ic.ac.uk!uknet!festival!edcogsci!richard
From: richard@cogsci.ed.ac.uk (Richard Tobin)
Subject: MS-DOS can't see disk, BSD can
Message-ID: <Cu2D5v.GEr@cogsci.ed.ac.uk>
Organization: HCRC, University of Edinburgh
Date: Fri, 5 Aug 1994 13:22:42 GMT
Lines: 32

Can anyone suggest why MSDOS would be unable to access a disk, in the
following sense:

 - fdisk hangs for about 30 seconds, then says "unable to access disk 2"
   (disk 1 and 3 are fine)
 - os-bs hanges for about a minute, then exits with a message "can't
   read partition table".

The disk is a Maxtor 200Mb IDE disk.  Disk 1 is a Rodime 200 Mb IDE.
Disk 3 is a SCSI disk - it doesn't make any difference whether it's
connected.  The machine is a 386DX EISA, with Fahrenheit VA graphics
card, Apaptec 1542 SCSI adaptor (+ Toshiba CDROM), and SoundBlaster.

FreeBSD and NetBSD see the disk with no problem.  It doesn't seem to
make any difference whether or not there's a DOS partition on the
disk.  I've tried MSDOS versions 6.2, 6.0 and 4 and they all have
the problem.

The disk used to be visible to MSDOS, but I've added and changed
the hardware somewhat since then.  (I didn't try to access this disk
from MSDOS for about a year.)

What might MSDOS be trying to do that doesn't work, when the disk
appears fine to BSD?  Are there any diagnostic programs available
that might help?

-- Richard
-- 
Richard Tobin, HCRC, Edinburgh University                 R.Tobin@ed.ac.uk

Ooooh!  I didn't know we had a king.  I thought we were an
autonomous collective.