[CentOS] LVM VG disappears after kernel upgrade on 5.1

Sat Mar 8 04:55:35 UTC 2008
Ted Miller <tedjeanmiller at sbcglobal.net>

Amos Shapira wrote:
> On Fri, Mar 7, 2008 at 5:07 PM, Ted Miller <tedjeanmiller at sbcglobal.net> wrote:
>> I finally got 5.1 to boot after install (install couldn't keep the disk IDs
>>  from getting crossed up, so at reboot partitions were not where install
>>  said they would be).
>>
>>  I needed to compile vmware and nvidia modules, but decided to upgrade
>>  first.  Told yumex to upgrade everything.
>>
>>  When I went to reboot the VG with / on it is not seen by the kernel.  (root
>>  partition is LVM on top of RAID 1).  If I go back to the old kernel
>>  everything boots fine.  On the new kernel only the VG on sdc is seen by LVM.
>>
>>  1. How do I persuade the new kernel to notice the VG with my root partition
>>  on it.
> 
> Not sure this is related but I suppose a "vgscan" wouldn't hurt, would it?

Kind of hard to do a vgscan when a kernel panic occurs after about 20 lines 
of boot messages.  As soon as it tries to pivot mount the root directory I 
get a kernel panic, because the root partition is on the VG it doesn't see.

Ted Miller