Message-ID: <01FD6EC775C6D4119CDF0090273F74A4FD689B@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: Mon, 16 Sep 2002 17:57:16 +1000
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Reply-To: opendos AT delorie DOT com

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.

> -----Original Message-----
> From:	Joydeep Mitra [SMTP:jolly_joydeep AT hotmail DOT com]
> Sent:	Saturday, September 14, 2002 11:49 AM
> To:	opendos AT delorie DOT com
> Subject:	RE: CD-ROM Compatibility
> 
> Hi,
> 
> When the CD was burnt, it probably didn't meet the ISO9660 standard
> exactly (Nero CD burning software allows the user to "relax" the
> standard for extra flexibility - but warns that the CD may be unreadable
> under DOS). Linux usually doesn't mind but DOS does.
> 
> Alternatively the CD was burnt using ISO Level 2 Standard or the Joliet
> standard, in which case it would definitely be unreadable in DOS
> (because these standards allow 31 character file names without storing a
> 8.3 version for DOS systems).
> 
> Unfortunately, I believe there is no workaround for this.
> 
> Regards,
> 
> Joydeep
> 
> > -----Original Message-----
> > From: da Silva, Joe [mailto:Joe DOT daSilva AT emailmetering DOT com]
> > Sent: Friday, 13 September 2002 12:47 PM
> > To: 'opendos'
> > Subject: CD-ROM Compatibility
> > 
> > Hi folks.
> > 
> > I've been given a CD-ROM (disk), which I can't seem to read with
> > DR-DOS. I get an "I/O error reading drive F:" message, yet under
> > Linux and W95, using the same hardware, I can read this silly
> > CD-ROM without problems.
> > 
> > On one PC, with a 6 speed NEC drive, I have DR-DOS 6.0 and
> > have tried both MSCDEX and NWCDEX. Both give that I/O error.
> > Rebooting in Linux 2.4 (Mandrake 8.0), the CD-ROM reads fine.
> > 
> > On another PC, with a 40 speed Pine drive, I have DR-DOS 7.02+
> > with NWCDEX. This combination gives the above error. Rebooting
> > in Windoze 95SR2, again the CD-ROM reads fine. "Shutting down
> > to M$-DOS" (MSCDEX loaded via AUTOEXEC.BAT), I can access
> > the CD-ROM without error, although it shows no files, due to LFN
> > issues (I think).
> > 
> > So, why do I get these I/O errors under DR-DOS if I try to access
> > this particular CD-ROM, yet not Linux or W95, using the same
> > hardware? Is there some fix for this (eg. some special "driver")?
> > 
> > BTW, I'm told the CD-ROM was "burnt" on a Windoze 2000
> > system using some software called "Ahead Nero" (never heard
> > of it, but then I'm not familiar with CD-ROM burning, anyway).
> > 
> > TIA,
> > Joe.