[gentoo-user] Re: No cdrom device created

[walt]

On 12/07/2010 05:15 PM, Harry Putnam wrote:
> walt<w41ter@×××××.com>  writes:
>
> [...]
>
>>> dmesg|grep -2 hdc
>>>
>>> [    1.416847] hdb: UDMA/100 mode selected
>>> [    1.417357] Probing IDE interface ide1...
>>> [    2.089165] hdc: LITE-ON CD-ROM LTN-5291S, ATAPI CD/DVD-ROM drive
>>
>> You're still using the deprecated ATA/ATAPI/MFM/RLL disk drivers. You
>> should completely unselect that set of drivers and use the newer ones
>> in Serial ATA and Parallel ATA drivers instead.
>>
>> Doing that will cause all of your /dev/hd* to be renamed /dev/sd*
>> including any cd/dvd drives.  My /dev/cdrom is a symlink to /dev/sr0,
>> for example.  The links are created automatically on the next reboot,
>> but you'll need to edit /etc/fstab to reflect the new drive names
>> before you reboot with the new kernel.
>
> What is the advantage of doing that?  Are the other drivers better in
> some way.  Maybe more likely to recognize /dev/hdc, or maybe more
> likely to give helpful output if that fails...?

Remember, you won't have an hdc or any other hd* after switching drivers.

But yes, everything is more likely to "Just Work" if you get rid of the
old deprecated disk drivers and use the new ones instead.  I get the
feeling (but can't prove) that utilities like 'udisks' and 'udev' have
made the switch already to the sd* device names, and that's probably
why you are having this problem.

It solved the same problem for another poster a few weeks ago, can't
recall who it was.

Remember, if you screw up your /etc/fstab file, you can use the kernel
command-line option "root=/dev/sdx" when booting with grub.  You'll
eventually get the correct sd device by trial-and-error :)