On 31-Mar-01 Gorkem Cetin opined:
> Hi,
>
> I'm trying to rescue a system (Dell PowerEdge 2450 with RH 6.2
> preinstalled on a RAID system). The problem is as follows:
>
> 1. I upgraded 2.4.2 kernel RPMS (rpm -Uvh 2.4.2) and did the necessary
> upgrades of other RPMSs.
Mistake #1: _NEVER_ use the -U flag for kernels. Use the -i flag so that
the old kernel is available to fall back on in case something goes wrong.
> 2. Unfortunately 2.4 kernel didn't properly see the RAID system, and
> now
> the system does not boot at all.
That's the reason you keep the old kernel around.
> What I tried (might be of your interest):
>
> 1. making a boot disk from another Dell machine without a RAID card
> (didnt
> work, I suppose necessary modules was not included in the boot disk)
Probably had the old kernel, possibly had the wrong boot partition as
well.
> 2. Trying to install a small system on an unused partition (didnt work,
> the installer says it didnt find a suitable device to install).
Not sure here. An extended partition perchance?
> What do you think? How can I boot the system and install the
> good-old-new
> kernel?
>
> There are thousands of users now waiting to connect, and the situations
> is
> getting worse every minute..
You can _maybe_ get it going in rescue mode or single user mode then
repair it. I personally doubt it: the new kernel doesn't work and the old
kernel is gone. One or the other is needed to boot.
If the boot partition is different than the other machine _and_ the other
machine has the 2.4 kernel, a bootdisk might work by typing at the boot
prompt "linux root=/<boot-partition>" at the commandline, replacing
<boot-partition> with the correct partition name for the bad machine.
If the other machine doesn't have 2.4 and you can't get in to rescue the
system, install the CDROM in the reader, boot up and reinstall.
---
Capital punishment means never having to say "YOU AGAIN?"
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