[CentOS] grub, initrd and Co

[Ross Walker]

On Jun 8, 2010, at 9:02 AM, Philippe Naudin <philippe.naudin at supagro.inra.fr 
 > wrote:

> Le Tue, 08 Jun 2010 14:30:40 +0200,
> Mogens Kjaer <mk at lemo.dk> a écrit :
>
>> On 06/08/2010 02:13 PM, Philippe Naudin wrote:
>> ...
>>>>> mount: error mounting /dev/root on /sysroot as auto: No such  
>>>>> device
>> ...
>>> Any idea ?
>>
>> /etc/fstab looks good; now what's in your /boot/grub/grub.conf file?
>
> # cat /mnt/linux/etc/grub.conf
> # grub.conf generated by anaconda
> #
> # Note that you do not have to rerun grub after making changes to  
> this file
> # NOTICE:  You do not have a /boot partition.  This means that
> #          all kernel and initrd paths are relative to /, eg.
> #          root (hd0,0)
> #          kernel /boot/vmlinuz-version ro root=/dev/hda1
> #          initrd /boot/initrd-version.img
> #boot=/dev/hda
> default=0
> timeout=5
> splashimage=(hd0,0)/boot/grub/splash.xpm.gz
> hiddenmenu
> title CentOS (2.6.18-194.3.1.el5)
>        root (hd0,0)
>        kernel /boot/vmlinuz-2.6.18-194.3.1.el5 ro root=/dev/hda1
>        initrd /boot/initrd-2.6.18-194.3.1.el5.img
>
>>
>> BTW, if you boot in rescue mode from the installation DVD/CD, does
>> it automatically mount everything?
>
> Yes, including swap, and dmesg doesn't report any errors. I chrooted
> to /mnt/sysimage and tried grub-install /dev/hda1 :
> Installation finished. No error reported.
> (hd0) /dev/hda
> ... but no better result after a reboot (exactly the same messages).
>
> My bet is : grub is ok, initrd maybe, but something else is missing
> (udev ? selinux is disabled).

What does modprobe.conf look like?

-Ross