F7 Motherboard change

[Rick Stevens]

Ville-Pekka Vainio wrote:
> Marco Maccaferri wrote:
>>  From the boot messages looks like it is still loading the old
>> motherboard's drivers so it can't find the new hard drive controller.
> 
> I recently had a similar issue when I changed my motherboard. You probably 
> need to make a new initrd. So boot with a Fedora rescue disk and let it 
> search for your Fedora installation, also enable networking, if possible.
> 
> When you get to the rescue console, chroot to the original system (I think 
> it's usually done by "chroot /mnt/sysimage").

At this point, you should also check your /etc/modprobe.conf (if you're
using SCSI or Fiberchannel/SATA HBA adapters) and make sure all the
drivers specified are accurate for your new motherboard.  A rebuild of
the initrd with a bogus modprobe.conf won't get you anywhere.

>                                             At this point you may want to 
> try removing and reinstalling the latest Fedora 7 kernel, that should make 
> you a new initrd. If it doesn't work, you may want to do something like this:
> 
> The initrds are in /boot, so cd to /boot and move your original initrd out of 
> the way, something like "mv initrd-2.6.25.3-18.fc9.i686.img 
> initrd-2.6.25.3-18.fc9.i686.img.orig" and then make a new one. Because I so 
> rarely need to use the mkinitrd command, I'm not exactly sure my example will 
> work, please see the mkinitrd man page first. But I'd try something 
> like "mkinitrd /boot/initrd-2.6.25.3-18.fc9.i686.img 2.6.25.3-18.fc9.i686". 
> Of course modify the versions to match those you have in your system. I'm not 
> sure if the latter part actually needs the "i686" as well, I think it does, 
> though. If that succeeds, reboot and hope for the best :)

If you know what the kernel version is, the command to rebuild an
EXISTING initrd image is:

	mkinitrd [-v] -f /boot/initrd-(kernver).img (kernver)

replacing "(kerver)" with the appropriate string.  On my current F8 box,
it'd be:

	mkinitrd -v -f /boot/initrd-2.6.24.7-92.fc8.img 2.6.24.7-92.fc8

I like the "-v" so I can see what mkinitrd is doing (and which drivers
it's loading into the image).
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- Rick Stevens, Systems Engineer                       rps2 at nerd.com -
- Hosting Consulting, Inc.                                           -
-                                                                    -
-                    I doubt, therefore I might be.                  -
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