Re: eject: unable to find or open device for: `cdrom'

[Nataraj <incoming-fedora-list rjl com>]

On Sun, 2008-08-31 at 21:18 +0100, Paul Smith wrote:
> On Sun, Aug 31, 2008 at 8:49 PM, Nataraj <incoming-fedora-list rjl com> wrote:
> >> >> When I try to open the DVD burner tray with the command eject, I get
> >> >> the following problem:
> >> >>
> >> >> $ eject
> >> >> eject: unable to find or open device for: `cdrom'
> >> >> $
> >> >>
> >> >> Any ideas?
> >> >
> >> > Use "eject /dev/name-of-dvd-device". If you're not sure what the device
> >> > name is, an easy way to find out is by firing up k3b, which will look
> >> > for it (there are probably quicker ways but this works).
> >>
> >> Thanks, Patrick. K3b does not see the inserted CD.
> >>
> >> The problem that I am reporting did not occur before. I suspect that
> >> some updates may have destroyed what was correctly working.
> >>
> >> Any further ideas?
> >
> > /dev/sr0
> > /dev/sr1
> 
> No progress:
> 
> $ eject /dev/sr0
> eject: unable to find or open device for: `/dev/sr0'
> $ eject /dev/sr1
> eject: unable to find or open device for: `/dev/sr1'
> $
> 
> Paul

Check /var/log/messages or run /bin/dmesg right after booting. If you
have a recent standard kernel, it should detect the cdrom drive and load
a driver for it.

Mine looks like this:
Aug 31 11:03:16 whitewave kernel: scsi 5:0:0:0: CD-ROM            PLEXTOR  DVDR   PX-712A   1.03 PQ: 0 ANSI: 5
Aug 31 11:03:17 whitewave kernel: sr0: scsi3-mmc drive: 125x/125x writer cd/rw xa/form2 cdda tray
Aug 31 11:03:17 whitewave kernel: Uniform CD-ROM driver Revision: 3.20

There may be other unrelated lines between these lines in the messages
file.  Once you've verified that the kernel sees your drive and is
loading a driver, you can create inode entry in /dev with something like
this:

cd /dev
./MAKEDEV sr

Then you can create a symlink to /dev/cdrom
ln -s ./sr0 cdrom

Unless your system is screwed up in some other way, my sense is that
this should work.  Otherwise you can use mknod to create the device.

nataraj