can data be found after cleaning the first sector by mistake? (tears in my eyes)

I have 2 disk sda and sdb, build a md0 on them, and create vg and lv on top of md0.

when i upgraded my system from fedora 2 to 3, it reported my sda and sdb contain uninitialized partition table and need to clean. i mad a stupid error by pressing yes!

now no matter what command i execute, it reports.

[root@localhost ~]# lvscan
Logical volume (vol1) contains an incomplete mapping table. Volume group "datavg" not found
[root@localhost ~]# pvscan -P
Partial mode. Incomplete volume groups will be activated read-only. Logical volume (vol1) contains an incomplete mapping table. No matching physical volumes found
[root@localhost ~]# vgmknodes
Logical volume (vol1) contains an incomplete mapping table. Volume group "datavg" not found

i wonder if there is any way to get my personal data back. thanks so much if anybody can give a hint!

these are my system information

[root@localhost ~]# fdisk /dev/sda -l

Disk /dev/sda: 164.6 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

[root@localhost ~]# fdisk /dev/sdb -l

Disk /dev/sdb: 164.6 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

[root@localhost ~]# more /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sda[0] sdb[1]

      160836416 blocks [2/2] [UU]

unused devices: <none>

forgot to mention that

[root@localhost ~]# pvcreate -t /dev/md0
Test mode: Metadata will NOT be updated.
Can't initialize physical volume "/dev/md0" of volume group "datavg"
without -ff

so it looks like it can tell /dev/md0 is a pv belongs to vg datavg, but some data are missed.

ming