Preserve Existing RAID1 HDDs with LVM2

[n43w79]

Hello,
I am trying to re-install but to preserve the existing /dev/sd{a,b} as follows with fatal error:
# <type> <mountpoint> <size> <fs type> <mount options>

disk_config disk1 preserve_always:all
primary  -      128        -     -
primary  -      1024       -     -
primary  -      0-         -     -

disk_config disk2 sameas:disk1

#Software raid1
disk_config raid preserve_always:all
raid1    /boot  disk1.1,disk2.1  ext2  rw,errors=remount-ro
raid1    swap   disk1.2,disk2.2  swap  rw
raid1    -      disk1.3,disk2.3  -     -

# define volume groups
disk_config lvm preserve_always:all
vg        vg0       md2
vg0-root  /         20G    ext3  rw,errors=remount-ro
vg0-tmp   /tmp      1024   ext3  rw
vg0-home  /home     190G   ext3  rw,nosuid createopts="-m 1" tuneopts="-c 0 -i 0"
vg0-var   /var      20G    ext3  rw
vg0-www   /var/www  20G    ext3  rw
vg0-usr   /usr      20G    ext3  rw
vg0-srv   /srv      20G    ext3  rw
===End===
Can anyone help?
Kwon