[BlueOnyx:12560] Re: Kernel Question

[Chuck Tetlow]

> Hi Maurice, 
> 
> >> > There is/was a long-term fix in the works, but obviously there is a lot 
> >> > of scope for this going wrong if it were deployed to lots of machines! 
> > 
> > Wasn't there an update release to address this? 
> 
> It's fixed for new Scientific Linux based BlueOnyx installs, as I worked 
> that into the CD installer. This happened earlier last year (April 
> 2012?) or thereabouts. 
> 
> However, I didn't release a YUM update to fix it automatically on older 
> SL based BlueOnyx installs. While the fix is trivial, I'm not really 
> keen to push out an update that has the small chance that hundreds of 
> servers might not come up after their next reboot. 
> 
> I have seen isolated cases where /etc/grub.conf (which usually is 
> perfect) didn't contain all the needed entries, were missing the actual 
> kernel or had other kernel parameters than the faulty copy in 
> /boot/grub/grub.conf. So just copying over grub.conf and placing a 
> symlink might work for 98.5% of the cases. But I can't risk the 
> potential damage for those where it might not work. 
> 
> -- 
> With best regards 
> 
> Michael Stauber

Apparently, I'm one of the 'lucky' 1.5%. 

I still have a virtual machine that won't boot - because the initial start kernel in /boot can't load the correct driver to mount & access the LVM partition with /root in it.  So apparently, the /boot/grub/grub.conf did not get correctly updated.

If I could just mount that LVM partition, I could copy over the /etc/grub.conf.  But I can't figure out how to get into that LVM partition using a Rescue CD image, or using a Knoppix Live CD image.  :-(

I still need to get this 5107R VM to boot - there is data on it that we don't have a backup.  And it would cost us a lot to recreate!

Anyone have any idea how to mount a LVM partition using a Live CD??

Chuck

 
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