mount: unknown filesystem type 'LVM2_member'

root@server7 ~ # mount /dev/md1 /mnt/
mount: unknown filesystem type 'LVM2_member'
root@server7 ~ # modprobe dm-mod
root@server7 ~ # lvmdiskscan
root@server7 ~ # vgchange -ay
  2 logical volume(s) in volume group "vg0" now active
root@server7 ~ # lvscan
  ACTIVE            '/dev/vg0/root' [50.00 GiB] inherit
  ACTIVE            '/dev/vg0/swap' [4.00 GiB] inherit
root@server7 ~ # mount /dev/vg0/root /mnt/
root@server7 ~ #