Incorrect metadata area header checksum

hi-

what does this error mean, and how do i rectify it? i have existing lvm volumes on this box, but creating this big one (~350gb) on my new software-raid5 array is giving me grief. i can mke2fs /dev/md2 just fine, but when i try to install lvm2..:

root@cerulean:~# pvscan
  PV /dev/md1   VG raid1   lvm1 [15.65 GB / 0    free]
  Total: 1 [0   ] / in use: 1 [0   ] / in no VG: 0 [0   ]

root@cerulean:~# pvcreate /dev/md2
  Failed to read label on physical volume /dev/md2
  Physical volume "/dev/md2" successfully created

root@cerulean:~# vgcreate raid5 /dev/md2
  Incorrect metadata area header checksum
  Incorrect metadata area header checksum
  Volume group "raid5" successfully created

root@cerulean:~# vgdisplay raid5
  Incorrect metadata area header checksum
  Incorrect metadata area header checksum
  Volume group "raid5" doesn't exist

more info:

root@cerulean:~# uname -a
Linux cerulean 2.4.21-rc2-ac2 #1 Sun May 18 12:08:13 PDT 2003 i686 GNU/Linux

root@cerulean:~# egrep 'DEV_DM|DEV_LVM' /boot/config-2.4.21-rc2-ac2 
# CONFIG_BLK_DEV_LVM is not set
CONFIG_BLK_DEV_DM=y

root@cerulean:~# dpkg -s lvm2 | grep Version
Version: 1.95.15-1

root@cerulean:~# dpkg -s raidtools2 | grep Version
Version: 1.00.3-2

root@cerulean:~# cat /proc/mdstat 
Personalities : [raid1] [raid5] 
read_ahead 1024 sectors
md0 : active raid1 sdb1[1] sda1[0]
      976768 blocks [2/2] [UU]

md1 : active raid1 sdb3[1] sda3[0]

      16418752 blocks [2/2] [UU]

md2 : active raid5 sdd1[3] sdc1[2] hdc1[1] hda1[0]

      351654528 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]

unused devices: <none>

thanks,

jeff

Two things to try:
1) Set up filters in lvm.conf to make sure LVM only looks at /dev/md and not the underlying devices directly.

2) Use a bigger Physical Extent size with vgcreate.

If that still doesn't work, run with the verbose flags (-vvv) or set the debug log-to-file options in lvm.conf to get more diagnostic information.

Alasdair

[email protected]