lvm over raid confusion

[Paul Howarth]

Jack Tanner wrote:
> Paul Howarth <paul <at> city-fan.org> writes:
> 
>> If you boot the installer CD with "linux rescue" (is that the same as 
>> the rescue CD?) and let it find the system you want to rescue on your 
> 
> I think it *is* the same.
> 
>> hard disk, it'll mount your existing system under /mnt/sysimage and give 
>> you a shell prompt into which you can do the chroot command, edit 
>> /etc/modprobe.conf and run mkinitrd. I did this myself on Saturday night 
>> when an FC5 upgrade fell over at the last moment.
> 
> Right. But it doesn't mount the existing system for me! ("Can't find any Linux
> partitions"). I wonder if the rescue initrd doesn't have the raid modules
> compiled in either... 

Seems unlikely (without checking).

> Hm. These seem related:
> http://news.gmane.org/find-root.php?message_id=%3c442423F7.7060100%40feuerpokemon.de%3e
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=186312
> https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=186182

Hmm, curious. I've successfully upgraded my home desktop, which has 6 
RAID1 arrays, without issues. I did, however, have an issue with some 
old LVM metadata:

http://bugzilla.redhat.com/186395

Paul.