FreeBSD 5.x raid...

[Casper]

  Hi,

  I have web server with one ata system disk and two sata disks for www 
stuff... I wanted to make that all www stuff is on one sata disk and 
mirror (backups) it to second disk if first sata brakes... So I have 
little experience with vinum (one samba server vinum raid5 working ok 
without problem) so I wanted to make on www server with vinum raid1...
But something not working:
dmesg:
ad4: 190782MB <WDC WD2000JD-22HBB0/08.02D08> [387621/16/63] at 
ata2-master SATA150
ad6: 190782MB <WDC WD2000JD-22HBB0/08.02D08> [387621/16/63] at 
ata3-master SATA150

#cat www.vinum
drive a device /dev/ad4c
drive b device /dev/ad6c
volume www
plex org raid1 512k
sd length 165g drive a
sd length 165g drive b

root at www# vinum create -f www.vinum
    4: plex org raid1 512k
** 4 Invalid plex organization: Invalid argument
    5: sd length 165g drive a
** 5 Unnamed sd is not associated with a plex: Invalid argument
    6: sd length 165g drive b
** 6 Unnamed sd is not associated with a plex: Invalid argument
2 drives:
D a                     State: up       /dev/ad4c       A: 190782/190782 
MB (100 %)
D b                     State: up       /dev/ad6c       A: 190782/190782 
MB (100 %)

1 volumes:
V www                   State: down     Plexes:       0 Size:          0  B

0 plexes:
0 subdisks:

What is problem?

Casper

P.S. I have googled problem and found:
http://lists.freebsd.org/pipermail/freebsd-questions/2005-May/088698.html
there ppl is saying that they don`t like in 5.x vinum, any better 
sugestion? I have no coplains about vinum raid5 on 5.3 samba server, it 
works good.. :)