Path: cdrom.com!barrnet.net!sgiblab!swrinde!cs.utexas.edu!howland.reston.ans.net!pipex!zaphod.crihan.fr!jussieu.fr!univ-lyon1.fr!frmug.fr.net!pern.frmug.fr.net!jmm73
From: jmm73@pern.frmug.fr.net (Jean-Michel MERCIER)
Newsgroups: alt.cd-rom
Subject: Re: Sun CD on PC with Adaptec 1542B: won't work with DOS?
Message-ID: <mRbntAaFBh107h@pern.frmug.fr.net>
Date: Sat, 2 Apr 94 13:07:34 +0100
References: <2mohmt$mfd@sparkyfs.erg.sri.com>
Organization: Where the Dragons and then Knights live (Private node)
Lines: 28

In <2mohmt$mfd@sparkyfs.erg.sri.com> ted@sparkyfs.erg.sri.com (Ted Nolan) writes:
>Anyway, I have a DX2-66 486 with an Adaptec 1542B SCSI card.  On the SCSI
>bus, I have a Sun CD drive.  Internally this seems to be a
>Sony CDU-8012 rev 3.1e

>Normally I run NetBSD-0.9, a free Unix clone.  The CD works great under BSD,
>but I recently had the need to boot MS-DOS (6.0) and use mscdex.exe to access
>the drive there.  Using the adaptec DOS SCSI drivers and the DOS 6 mscdex.exe,
>I can see the drive on DOS boot, and if I do a DIR on drive D:, the drive
>access light comes on, but it tells me:

I don't know it is the good answer, but I have heard
that Unixes like devices with 512 bytes/sector and CD-ROM
usually have 2048 bytes/sectors.

So, the SUN-CD might have been modified for such purpose and when
you try to use it on DOS (which might expect 2048bytes/sector),
MSCDEX gets lost :-(

May a idea but I'm not a guru, sorry.

-- 
  +-------------------------------------------------------------------+
  | another post from : Jean-Michel MERCIER   jmm73@pern.frmug.fr.net |
  |           PERN : Where the Dragons and the Knights live           | 
  +-------------------------------------------------------------------+
  |  Please, no email >100Ko without permission (I pay hot for it)    |
  +-------------------------------------------------------------------+