looking for udev rules to differentiate cdrom dvd

looking for udev rules to differentiate cdrom dvd

[Joseph Mack NA3T]

Thinkpad 600E,
2.6.13, udev-062, sysfsutils-1.3.0, hotplug-2004_09_23

I have both a cdrom and dvd for this machine. I was hoping 
to use systool and udevinfo to differentiate these two, and 
allow me to set up udev rules to have /dev/cdrom or /dev/dvd 
depending on which piece of hardward was in the machine.

However both the cdrom and the dvd appear the same to 
systool and udevinfo (/sys/block/hd{a,c}/...)

Looking for alternatives, lspci doesn't see them at all, but 
dmesg knows what I have.

Should I be able to see the difference between the cdrom and 
the dvd with udevinfo?

Thanks Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml 
Homepage http://www.austintek.com/ It's GNU/Linux!


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Re: looking for udev rules to differentiate cdrom dvd

[Greg KH]

On Wed, Nov 16, 2005 at 01:14:22PM -0800, Joseph Mack NA3T wrote:
> 
> Thinkpad 600E,
> 2.6.13, udev-062, sysfsutils-1.3.0, hotplug-2004_09_23
> 
> I have both a cdrom and dvd for this machine. I was hoping 
> to use systool and udevinfo to differentiate these two, and 
> allow me to set up udev rules to have /dev/cdrom or /dev/dvd 
> depending on which piece of hardward was in the machine.
> 
> However both the cdrom and the dvd appear the same to 
> systool and udevinfo (/sys/block/hd{a,c}/...)
> 
> Looking for alternatives, lspci doesn't see them at all, but 
> dmesg knows what I have.
> 
> Should I be able to see the difference between the cdrom and 
> the dvd with udevinfo?

No, but cdrom_id can do this for you.  It's in the udev package, and
most distros set this up to handle it automatically.

Hope this helps,

greg k-h


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