[mythtv-users] LVM Volume not mounting - Unknown Partition Error

[Joel Turner]

I've done something incredibly stupid and am wondering if there is any 
way to recover.  I have a Myth system that's been acting up the last 
month that I had planned on reinstalling.  I plugged in a spare hard 
drive, unplugged my boot drive and went through an initial installation 
of Fedora FC5.  The original system was an Ubuntu Breezy install.  
During the Fedora installation it complained that it could not read my 
partition information on /dev/sda and dev/sdb which is my LVM volume 
with  an xfs file system.  I'm positive that I instructed it not to 
continue looking at those hard drives.  When it came time to partition 
the spare drive, only /dev/hda was shown.  I went through the install, 
did a yum update and was prepared to call it an evening. I plugged my 
original hard drive back in and went to boot my system.  To my horror 
the LVM volume would not mount and /var/log/messages complained about an 
unknown partition on both /dev/sda and /dev/sdb. Pvdisplay shows no pe's 
but displays the proper uuid's. Vgscan does not locate the volumes.  
needless to say my wife is somewhat upset. Does anyone have any 
suggestions on how to proceed in recovery of the partition table and/or 
the volume or is it pretty much gone?

Thanks.

--Joel Turner