Re: [Sheflug] strange problem with CDROM...

[Guennadi Liakhovetski <nospam [at] ragingbull.com>]

But you enabled SCSI-emulation for CD-ROM on purpose, didn't you? I
thought about it and tried - no success 'device not configures'. Can you
do, e.g.
dd if=/dev/scd0 of=/dev/null bs=1024 count=8
? And yours gets detected at boot-time as scd0, right? Is your
SCSI-emulation compiled into the kernel or as a module? We enabled
SCSI-emulation for a tape-drive, which is on ide1, and hd is hda and cdrom
hdb... If everything else fails, maybe I'll try forcing SCSI-emulation on
it too... But on the same ide0 hd is working in ATA-mode no prob. (but its
driver is compiled into the kernel...)

Guennadi

On Thu, 15 Mar 2001, Graham Cox wrote:

> With the SCSI-Emulation, on my install at least, my CD-ROM drive is
> accessable as /dev/scd0 instead of /dev/hdc which it was before on the old
> IDE system. This may be worth a try, just in case it's causing the problems
> here.
> 
> HTH
> --
> Graham
> 
> 
> ----- Original Message -----
> From: "Guennadi Liakhovetski" <g.liakhovetski [at] ragingbull.com>
> To: "Sheflug" <sheflug [at] vuw.ac.nz>
> Sent: Thursday, March 15, 2001 9:28 PM
> Subject: Re: [Sheflug] strange problem with CDROM...
> 
> 
> > On Thu, 15 Mar 2001, Will Newton wrote:
> >
> > > On Thu, 15 Mar 2001, Guennadi Liakhovetski wrote:
> > >
> > > > I've got a pretty new machine here (P-II ~750MHz), I recently compiled
> a
> > > > 2.4.2 kernel for it, it's working fine, but... I just noticed - I
> can't
> > > > mount cds!... cdrom is detected at start-up, /dev/hdb looks fine, as
> > > > suggested i CDROM-HOWTO I checked dd if=/dev/hdb of=/dev/null bs=2048
> it
> > > > returned immediately with 0+0 blocks in/out... (yes, there's a cd in
> the
> > > > drive). It worked before with 2.2.14... (SuSE-6.4) And - what's the
> most
> > > > weird - as cdrom module gets loaded - at the same time lp parport and
> > > > parport_pc do!... WHY???... I checked - nothing like parallel ide was
> > > > compiled... Is anything wrong somewhere with /dev stuff? Can't see any
> > > > problems there... Or modules.config?... Ideas?
> > >
> > > Have you got the latest modutils?
> >
> > Sure - 2.4.2, as required in Documentation/Changes. Notice - for dd you
> > don't need ANY software support AT ALL (?), apart from a valid /dev/XXX
> > node. However, hdparm -i /dev/hdb shows info ok, as well as hdparm
> > -I... One thing that was changed from previous 2.2.14 kernel -
> > IDE-SCSI-emulation (for a tape drive) - it's compiled into kernel... Can
> > this cause the problem? But the CD-ROM is detected at boot-up as
> > /dev/hdb...
> >
> > > Also I believe there have been audio CD problems in 2.4.1/2.4.2.
> > > If you try the ac patches there may be a fix.
> >
> > No, it's a usual ISO-9660 disk...
> >
> > Guennadi
> >
> > >
> > >
> > > ---------------------------------------------------------------------
> > > Sheffield Linux User's Group - http://www.sheflug.co.uk
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> > >
> > >   GNU the choice of a complete generation.
> > >
> > >
> > >
> >
> > ___
> >
> > Dr. Guennadi V. Liakhovetski
> > Department of Applied Mathematics
> > University of Sheffield, U.K.
> > email: G.Liakhovetski [at] sheffield.ac.uk
> >
> >
> >
> > ---------------------------------------------------------------------
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> >
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> >
> >
> 
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> 
> 

___

Dr. Guennadi V. Liakhovetski
Department of Applied Mathematics
University of Sheffield, U.K.
email: G.Liakhovetski [at] sheffield.ac.uk


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