[TriLUG] Problem with LVM

[T. Bryan]

A while back I finally upgraded my Debian machine's kernel from 2.4.x to 
2.6.15.  I don't know much about LVM, but I had set up LVM with something 
like this (where /dev/md0 is a RAID1 device on two entire disk partitions).

pvcreate /dev/md0
vgcreate localvg /dev/md0
lvcreate -L20G -nlv_local1 localvg
mke2fs -j /dev/localvg/lv_local1
mount /dev/localvg/lv_local1 /opt

That seemed to work.  Update /etc/fstab to mount the logical volume at /opt, 
and it ran like a charm.  Post reboot, I could access /opt, and (from what I 
can remember), /opt appeared to be a logical volume on top of the RAID1 
device.

After the kernel upgrade...

# grep opt /etc/fstab
/dev/localvg/lv_local1  /opt    ext3    defaults        0       0
# mount /opt
mount: special device /dev/localvg/lv_local1 does not exist

I figured that something was wrong with my init scripts, but everything seems 
to be in place.  I've just lost /dev/localvg.

# mdadm --detail --scan
ARRAY /dev/md0 level=raid1 num-devices=2 
UUID=11252c08:1e94dede:5eaea508:309ed1a1
# mdadm -As /dev/md0
mdadm: device /dev/md0 already active - cannot assemble it
# pvscan
  Found duplicate PV 7LOs90S2Ff8W7Tq8ZGRsT41lphbExsLh: using /dev/hdg1 
not /dev/hde1
  PV /dev/hde1   VG localvg   lvm2 [111.79 GB / 91.79 GB free]
  Total: 1 [111.79 GB] / in use: 1 [111.79 GB] / in no VG: 0 [0   ]
# vgchange -a y localvg
  Found duplicate PV 7LOs90S2Ff8W7Tq8ZGRsT41lphbExsLh: using /dev/hdg1 
not /dev/hde1
  1 logical volume(s) in volume group "localvg" now active
# vgscan
  Reading all physical volumes.  This may take a while...
  Found duplicate PV 7LOs90S2Ff8W7Tq8ZGRsT41lphbExsLh: using /dev/hdg1 
not /dev/hde1
  Found volume group "localvg" using metadata type lvm2

So, do I just create /dev/localvg?  Should it be getting created at boot time?  
I'm not sure what's going on here, but I'd love to get my storage back.  :-)

Thanks, 
---Tom