Robert Heller wrote:
> At Wed, 16 Dec 2009 07:33:38 -0600 CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
>> Jussi Hirvi wrote:
>>>>> What should I do to make an existing CentOS (5.4) disc boot up on a new
>>>>> computer?
>>>>> [...]
>>>>> Would it be enough to boot with a DVD in rescue mode, or boot with
>>>>> another hd, and install grub?
>>> On 16.12.2009 12:16, Sorin Srbu wrote:
>>>> For me it has worked to just install the old hd in the new machine and boot
>>>> it up. Kudzo takes care of the rest.
>>> Then you have been lucky. :-) For me, the startup stopped already before
>>> the CentOS splash screen. I guess something was wrong with the initrd.
>>>
>> If the disk holding the / partition needs a different driver than what you had
>> during the install, you have to rebuild the initrd. Anaconda knows how to do
>> that, kudzo can't. You can do it from a rescue-mode boot, but you may have to
>> know the right module names.
>
> *Before* swapping out the old disk, add an appropriate scsi_hostadapterN
> (N >= 1) alias to /etc/modprobe.conf and then do:
>
> mkinitrd -f /boot/initrd-`uname -r`.img `uname -r`
>
> All should be good then.
>
> IF both the old machine and the new machine have your basic, vanila IDE
> disks, then there is no problem.
I've always wished the install/rescue disk had a mode to do this for you
after you've moved the disks or restored a backup. The reason you are
trying to bring up the new machine may be that the old one is dead - and
anaconda knows a lot more about picking the right driver modules than I
ever will. I've done it a time or two by installing a system on the new
(or matching) hardware with a separate /boot partition, then making sure
the old/new systems are updated to the same versions and keeping the new
/boot but copying the rest of the old system over.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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