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Date: Wed, 5 Mar 1997 13:03:54 -0800 (PST)
From: Doug White <dwhite@gdi.uoregon.edu>
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Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Glynn Stanton <glynn@nol.co.uk>
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Subject: Re: Bug?
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On Wed, 5 Mar 1997, Glynn Stanton wrote:

> 
> I have what I feel is a serious problem with FreeBSD 2.1.7
> 
> The Root partition is on a 320M disk, With bin, doc, dict and X.
> 
> The problem comes when I use mount_msdos to mount a 1G partition
> of my 2.5Gb Quantum Bigfoot.

OK, this is what probably killed you.  You may have gotten a 

warning: root cluster is not a multiple of clustersize in length

or something like that.  You should have IMMEDIATELY dismounted your msdos
partition and hope nothing broke.

> After a few commands, I start getting errors:
> bad file descriptor.
> 
> Unmounting the disk does not clear it, and last night the dev files
> were giving bad file descriptor errors resulting in a non bootable system.

Yes, your root filesystem may have been damaged.  You should be able to
fsck the filesystem from the fixit system and get the partition fixed.

This is a known bug and *may* have been fixed in 2.2.  But for the time
being, do NOT mount dos filesystems with 16k clusters, which is ones
greater than about 500mb (?).

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major