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Date:      Wed, 03 Jan 1996 11:06:19 -0800
From:      Scott Blachowicz <scott@statsci.com>
To:        Chuck Robey <chuckr@glue.umd.edu>
Cc:        questions@freebsd.org
Subject:   Re: Can FreeBSD be visible from Win95? 
Message-ID:  <199601031906.LAA02229@block.statsci.com>
In-Reply-To: Your message of "Wed, 03 Jan 1996 13:40:11 -0500." <Pine.SUN.3.91.960103133429.6638C-100000@latte.eng.umd.edu> 

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Chuck Robey <chuckr@glue.umd.edu> wrote[in private email to me, reprinted
here with permission :-)]::

> I'm not an authority on this by any means, but I'm pretty sure I'm right 
> on what I said.  That doesn't mean you could be right _too_, but I have 

I believe we are both right.

> heard lots of folks saying that the msdos filesystem code in FreeBSD is 
> not correct, and the reason I heard was because it tried to do buffering 
> of the msdos stuff, but the locking mechanism was incorrect, causing 
> errors to propagate.  This is supposed to be most obvious when doing mv 
> commands.  I think you could get either Justin Gibbs or Terry (I forget 
> his lastname, but you know who I mean) to explain it more authoritatively.

I've brought this up a couple times before and the result of the
discussions was that there seemed to be a connection between using FIPS to
shrink the DOS slice and the BSD corruptions I was seeing.  I believe the
FIPS author was involved in some of the discussion (though possibly not on
the FreeBSD lists??).  I think it had something to do with changing the
size of the used portion of the FAT without changing the size of the table
itself (there's a check for this sort of condition in the mtools package
that the FIPS author said shouldn't be made because the condition is
legitimate).  That's something that appears to be "legal" but confuses the
FreeBSD code (and, as I noted, MS-stuff and Linux have no problems with
it).  I'm no expert in any of this (DOS, file systems, ...).

And, I think it was Terry Lambert who was suggesting a possible connection
between having the FIPS-shrunk DOS slice before my BSD slice.

Scott Blachowicz    Ph: 206/283-8802x240    StatSci, a div of MathSoft, Inc.
                                            1700 Westlake Ave N #500
scott@statsci.com                           Seattle, WA USA   98109
Scott.Blachowicz@seaslug.org



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