*BSD News Article 85955


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From: kdd@ibgzko.zko.dec.com (Keith Dilsworth)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Mounting DOS drives antics
Date: Tue, 31 Dec 1996 18:32:33 GMT
Organization: Digital Equipment Corporation, Palo Alto, CA, USA
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My first interation of building a DOS and FreeBSD box I had 1.6GB disk
and only wanted a little DOS partition so I ran DOS 6.22 fdisk and
created a partion around 224MB and installed DOS.

I then allocated the rest of the disk for FreeBSD and installed it.
and spent many happy hours configuring it.  I then decided to mount
the DOS partition and copy a file over.  I started getting the
giberish and file not found junk.

I then rebooted to DOS and ran scandisk to fix my dos partition.  This
blew away FreeBSD.  Couldn't boot FreeBSD coundn't access it with a
fixit floppy. Fixit fisk had so many error I gave it the -y switch.
FreeBSD was GONE!

Last week I decided to try again.  Now I have two 1.6GB disks so I
desided to extend the dos partition to the maximum.  For this I used
presizer which I pulled from the net.  It imediatly told me my DOS
partition ended at and illigal boundry or somthing to that effect.  I
extended the DOS partition to the maximum (255MB with this cluser
size) and reinstalled FreeBSD 2.1.5

Since then I have mounted the DOS partition and both written and read
from it with FreeBSD.  The fist thing I did was scandisk from DOS just
in case...

It appeared that DOS fdisk created an illigal partition boundry and
FreeBSD used that boundry as the start of the FreeBSD partition.  DOS
scandisk did it's thing and crossed into the FreeBSD partition
corrupting the FreeBSD partition.