[CentOS] lost connection during yum update

[Les Mikesell]

On Sun, Mar 10, 2013 at 10:45 PM, Frank Cox <theatre at melvilletheatre.com> wrote:
>
> The most maddening part of this is that all of the files and the filesystems
> appear to be present -- I can boot off of a rescue CD and mount the whole works
> under /mnt/sysimage and browse to my hearts content.  I just can't boot the
> damn thing.
>
> How is a name like /dev/mapper/vg_ws195-lv_root rd_NO_LUKS determined?  If I
> knew how to read or find out what the actual name of the root directory was on
> the problem machines, I could compare it to what's in the grub.conf file.

I don't have any idea how to debug LVM stuff.  But if you can boot in
rescue mode just on general principles I would chroot into
/mnt/sysimage, rebuild the initrd and reinstall grub.

-- 
   Les Mikesell
     lesmikesell at gmail.com