trouble booting FC5. Please help!

Jim Cornette fc-cornette at insight.rr.com
Fri Jul 21 00:37:24 UTC 2006


Mikkel L. Ellertson wrote:
> Jim Cornette wrote:
>> Mikkel L. Ellertson wrote:
>>> I do not think this will work, because when the op deleted the /boot
>>> partition, the installed kernels and everything except the first
>>> stage Grub loader were deleted. The kernel(s) and the rest of Grub
>>> can probably be copied from the second install, but the
>>> init-<version>.img will have to be rebuilt to use the proper volume
>>> group. Then the grub.conf file will have to be edited to change
>>> VolGroup01 to VolGroup00. Then doing a grub-install would work. But
>>> it would also stop the second installation from booting. You would
>>> ether have to change where the first stage gets installed, and the
>>> add a chainload entry in the Grubconf on the second drive. Or modify
>>> the Grub install on the second FC5 installation, and chainload from
>>> the frist install.
>>>
>>> Mikkel
>> I missed that portion of the posting content. Since there were two
>> installations, I figured they were intact. The absense of grub in the
>> MBR was my focus.
>>
>>
>> It is probably possible to boot both installations from the same boot
>> partition and let the root filesystem be referenced to match the
>> particular installation. I think it would be a mess during updates to
>> the kernel though.
>>
>> I have successfully booted systems by just varying the root reference
>> before. They were the same versions relatively.
>>
>> Jim
>>
> Were they using logical volume management? From looking at the
> script that builds the initalrd image, it looks like the volume
> group for the root directory is part of the information in the
> image. That would prevent using the same initrd image for both
> installations. But this is my first installation using LVM, so I do
> not claim to be an expert. Before LVM, it was easy to change the
> root partition in the Grub command line.
> 
> Mikkel

They were regular partitions and not LVM. Tony referenced using LVM so 
it must honor grub entries with reference to the volume group.

Tony's excerpt below.
> I do that and have no trouble (FC3 on LogVol00, FC5 on LogVol02).  OK, the
> FC5 installer did remove all my other kernels, but I'd made a backup so it
> was easily fixed.  Yum updates don't seem to have any problem.

Jim

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