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From: Robert Nordier <rnordier@iafrica.com>
Message-Id: <199605311830.UAA00499@eac.iafrica.com>
Subject: Re: Cannot mount CD
To: dwhite@resnet.uoregon.edu
Date: Fri, 31 May 1996 20:30:15 +0200 (SAT)
Cc: questions@freebsd.org
In-Reply-To: <Pine.BSF.3.91.960531100440.11891A-100000@riley-net170-164.uoregon.edu> from "Doug White" at May 31, 96 10:06:03 am
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Doug White wrote:
> 
> On Fri, 31 May 1996, Gabor Zahemszky wrote:
> 
> > Last night I'd like to mount
> > ``MINDSCAPE U.S. ATLAS & ALMANAC (Version 6)''
> > I mounted it, as usual (mount -t cd9660 -r /dev/scd0 /cdrom)
> > Mount was OK. cd /cdrom -> /cdrom not a directory.
> > ???  It was mounted, but it was only a 2048 byte file.  In it, there was
> > the root dir of that (Windows/W95) CD.
> 
> My guess would be that this isn't a real CD.  Some CDs are written in a 
> portable format so they can sell it for PCs and Macs without having to 
> press two different CDs.  If it's only this CD, and everything else 
> works OK, then I'd say that this is the case, or something similar.
> 
> Just a guess.

As I understand it, the point of ISO-9660 is that it can be different
things to different operating systems.  (It has a volume descriptor
which can hold a whole lot of different OS-related entries, giving
alternative parameters.)

This probably doesn't make it less of a 'real' CD -- unless Real CDs
Don't Speak Mac; or Real CDs Don't Speak PC. :)

But Doug may be right: this particular CD might not pass its
fsck_9660, if there were such a thing.

--
Robert Nordier