m.roth at 5-cent.us wrote: > Robert Moskowitz wrote: >> >> On 07/01/2014 06:25 PM, Frank Cox wrote: >>> On Tue, 01 Jul 2014 18:19:32 -0400 >>> Robert Moskowitz wrote: >>> >>>> How do I trouble shoot this? I am assuming that I only got a >>>> partially completed update. >>> Try yum-complete-transaction and see what happens. >> >> Well it looks like all the updates 'took' /etc/redhat-release now >> reports ver 6.5. >> >> But still getting a kernel panic and boot failing. I can fall back to >> the prior kernel and it will boot. So I tried to copy the lines off the >> monitor, as nothing is getting logged: >> >> IOMMU: failed to mpa dmn 0 >> kernel panic - not syncing: VFS: Unable to mount root fs on >> unknown_block (0,0) >> Pid:1, comm swapper Tainted: G -------------} 2.6.32-431.20.3.el6.i686 >> #1 >> > May I offer a suggestion, if it's still not booting on the new kernel? Try > bringing it up on the old one, then mkinitrd while running, so the initrd > has all necessary drivers. Oh, another thought: when it gets to the grub boot, edit the kernel line to add rdshell at the end; hopefully, if it fails, it will give you the grub shell, and you can find out where the actual root drive *is*, which is, I think, what it's looking for and not finding in the grub line that tells it where / is. mark