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From:	"Joydeep Mitra" <jolly_joydeep AT hotmail DOT com>
To:	<opendos AT delorie DOT com>
Subject:	RE: CD-ROM Compatibility
Date:	Sat, 14 Sep 2002 11:48:56 +1000
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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.

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