Unfortunately, it is not yet perfect.  Last I heard, there is no DMA access
through the SCSI emulation mode.  This is OK for CD writing, but it is not
so good when you want to read from the same drive.  Depending how you
compile your kernel, changing between SCSI emulation and real IDE/ATAPI
access (for writes and reads respectively) might require a reboot after a
configuration change (again - depends on how you have built the kernel and
passed it parameters).

Tom Veldhouse
veldy at veldy.net

----- Original Message -----
From: "Michael Bresnahan" <mike at fruitioninc.com>
To: <tclug-list at mn-linux.org>
Sent: Thursday, January 04, 2001 12:20 PM
Subject: Re: [TCLUG] Answered... settings for a CD-RW


> The following URL answers all.
>
> http://www.guug.de/~winni/linux/cdr/html
>
> It appears that the CD burner drivers were implemented to only work with
SCSI
> devices, however you can make an IDE device look like a SCSI device by
using
> the "SCSI emulation" code.
>
> Thank you, Dave Kleist.
>
> Mike Bresnahan
> ----
> Michael Bresnahan wrote:
>
> > Can someone help out a newbie here and explain to me (or point me to
some
> > info) why you need "SCSI emulation" for a (presumably) IDE CDROM drive
> >
> > Mike Bresnahan
> > ----
> > Timothy Wilson wrote:
> >
> > > Hey everyone,
> > >
> > > I just installed my new Plextor PlexWriter 12/10/32 CD-RW. This is one
of
> > > those new drives with the "burn-proof" technology to prevent coasters.
> > >
> > > It's an internal EIDE unit and I know that I've got to get SCSI
emulation
> > > set up to use it. My question is more basic, however. I plan to call
this
> > > /dev/cdrw and mount it at /cdrw. What should I put in /etc/fstab so I
can
> > > use it? I assume that I can use the CD-RW and not just the CD-R part.
> > >
> > > -Tim
> > >
> > > --
> > > Tim Wilson      | Visit Sibley online:         | Check out:
> > > Henry Sibley HS | http://www.isd197.k12.mn.us/ | http://www.zope.org/
> > > W. St. Paul, MN |                              | http://slashdot.org/
> > > wilson at visi.com |   <dtml-var pithy_quote>     | http://linux.com/
> > >
> > > _______________________________________________
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> >
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