vinum on atapi raid

[Jonas Sonntag]

hi list

i'm trying to set up a concatenated vinum volume. i read chapter 13 in 
the handbook and as so often i've found a nice how-to on 
freebsddiary.org but somehow i'm stuck.

my /etc/vinum.conf file is like this:
drive a device /dev/ar1h
drive b device /dev/ar2h
volume stuff
 plex org concat
  sd length 117239m drive a
  sd length 78528m drive b


disklabels:
# /dev/ar1c:
type: ESDI
disk: ar1s1
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 14945
sectors/unit: 240107427
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  c: 240107427        0    unused        0     0        # (Cyl.    0 - 
14945*)
  h: 240107427        0     vinum                       # (Cyl.    0 - 
14945*)

# /dev/ar2c:
type: ESDI
disk: ar2s1
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 10010
sectors/unit: 160826652
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0

8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  c: 160826652        0    unused        0     0        # (Cyl.    0 - 
10010*)
  h: 160826652        0     vinum                       # (Cyl.    0 - 
10010*)


fidsk also looks good:

/dev/ar1:
The data for partition 1 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
    start 63, size 240107427 (117239 Meg), flag 80 (active)
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 1023/ head 254/ sector 63

/dev/ar2:
The data for partition 1 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
    start 63, size 160826652 (78528 Meg), flag 80 (active)
        beg: cyl 0/ head 1/ sector 1;
        end: cyl 1023/ head 254/ sector 63


now i seem to be missing something here.. when i do
vinum create -f /etc/vinum.conf

what i get is:

   1: drive a device /dev/ar1h
** 1 Can't initialize drive a: Operation not supported by device
   2: drive b device /dev/ar2h
** 2 Can't initialize drive b: Operation not supported by device
0 drives:
1 volumes:
V stuff                 State: down     Plexes:       1 Size:        191 GB

1 plexes:
P stuff.p0            C State: faulty   Subdisks:     2 Size:        191 GB

2 subdisks:
S stuff.p0.s0           State: crashed  PO:        0  B Size:        114 GB
S stuff.p0.s1           State: crashed  PO:      114 GB Size:         76 GB

messages says:
/kernel: vinum: stuff.p0.s0 is crashed
/kernel: vinum: stuff.p0 is faulty
/kernel: vinum: stuff.p0.s1 is crashed


i have 'obliterated' the volume, i have remade the devices i allways end 
up with "Operation not supported by device".

something similar happens when i'm using the concat command to vinum:
vinum -> concat -v /dev/ar1h /dev/ar2h
volume vinum0
  plex name vinum0.p0 org concat
drive vinumdrive0 device /dev/ar1h
Can't create drive vinumdrive0, device /dev/ar1h: Can't initialize drive 
vinumdrive0

i have come across this post: 
http://www.geocrawler.com/mail/msg.php3?msg_id=6949487&list=159
could that be the case with /dev/ar, too? i'm on 4.8-stable.

any hints how to go on would be great. please cc me, as i'm not on the list.

thanks and br
jonas