Message-ID: <01FD6EC775C6D4119CDF0090273F74A4FD68C0@emwatent02.meters.com.au>
From: "da Silva, Joe" <Joe DOT daSilva AT emailmetering DOT com>
To: "'opendos AT delorie DOT com'" <opendos AT delorie DOT com>
Subject: RE: CD-ROM Compatibility
Date: Fri, 27 Sep 2002 10:20:34 +1000
MIME-Version: 1.0
X-Mailer: Internet Mail Service (5.5.2653.19)
Content-Type: text/plain
Reply-To: opendos AT delorie DOT com

Thanks, Joydeep.

I've been contemplating the implications of this for a little while, and
have drawn the following conclusions :

1. By a process of elimination, as it were (ie. based on your reply),
   the problematic CD-ROM is a "Joliet" format disk.
2. Neither MSCDEX nor NWCDEX support "Joliet" CD-ROM's.

Have I got this correct?

BTW, I've had one CD-ROM previously, in which I couldn't access the
files in DOS due to LFN issues, but never before had I encountered
one in which any attempt to access the disk under DOS would result
in an I/O error.

Joe.

> -----Original Message-----
> From:	Joydeep Mitra [SMTP:jolly_joydeep AT hotmail DOT com]
> Sent:	Monday, September 16, 2002 6:43 PM
> To:	opendos AT delorie DOT com
> Subject:	RE: CD-ROM Compatibility
> 
> CDFS is what Windoze uses to access CDs which are "normal" (ie for
> ISO9660 and Joliet CDs). If you have a CD written using packets instead
> of complete blocks, or if you are accessing a DVD, then Windoze will use
> a UDF driver instead. 
> 
> From a programming standpoint, CDFS provides an API to read files from a
> CD like it was a read-only hard disk (when in reality reading from a CD
> is completely different), much like MSCDEX (or its equivalents) in DOS.
> 
> So the short answer to your question is "No".
> 
> Regards,
> 
> Joydeep
> 
> > -----Original Message-----
> > From: da Silva, Joe [mailto:Joe DOT daSilva AT emailmetering DOT com]
> > Sent: Monday, 16 September 2002 5:57 PM
> > To: 'opendos AT delorie DOT com'
> > Subject: RE: CD-ROM Compatibility
> > 
> > Thanks for the info., Joydeep.
> > 
> > Pity there is no work-around in DR-DOS ...     :-(
> > 
> > I just had an idea - in Windoze 95SR2 "My Computer", I right-clicked
> > on the F: (CD-ROM) drive and then selected "Properties". This reported
> > "File system : CDFS". Does this correspond to the "relaxed standard"
> > you referred to?
> > 
> > Joe.
> >