On 4/15/2013 1:44 PM, Les Mikesell wrote:
> On Mon, Apr 15, 2013 at 12:35 PM, <m.roth@xxxxxxxxx> wrote:
>
>>>> I had to replace the motherboard on one of my CentOS 4 systems and am
>>>> now getting a kernel panic.
> CentOS 4 - seriously???
Yea, it's an old system.
>
>>>> I can boot up with the boot CD, go into rescue mode and browse the
>>>> files, so I know the drives are ok.
>>>>
>>>> I found some stuff online saying that I should recreate my initrd from
>>>> rescue mode if the motherboard changed. I tried this, but am still
>>>> getting the same results.
>>> Anyone have any ideas here? I can rebuild the machine if I have to, but
>>> that's a last resort.
>> Sorry, hit <send> and had another thought: I think you said you rebuilt
>> the initrd... *could* you see the drives? *Did* the running system you
>> rebuilt from have all the LVM drivers loaded when you rebuilt it?
> You need to include whatever drivers loaded in rescue mode in the new
> initrd, but I've forgotten the exact details. In Centos5 you would
> add alias entries to /etc/modprobe.conf but it might have been named
> something else in C4. Maybe you can see what is there before you
> chroot to the installed instance and change the file there to match,
> then make the new initrd. Once in a similar circumstance I just
> copied the whole contents of ./boot from a different machine with
> identical hardware so I didn't have to know as much as anaconda about
> matching hardware and drivers.
There is a /etc/modprobe.conf file on the original system. Among other
things, it says:
alias scsi_hostadapter sata_nv
I assume that refers to the driver for the nvidia chipset.
I found a modprobe.conf file in the rescue environment living in
/tmp/modprobe.conf. This one says:
alias scsi_hostadapter ahci
I guess that's a driver that works with the new hardware? I do not have
the ports in ahci mode in the bios.
What do I need to do to make sure the driver gets into initrd? Or do I
just need to make the change to /etc/modprobe.conf on the hard drive?
--
Bowie
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