vinum limits disk size to 255MB

[Markus Hoenicka]

Hi all,

I'm trying to set up vinum on a freshly installed FreeBSD 5.3-BETA7
box. The system is installed on da0. I want to use three 18G SCSI
drives to create a vinum volume.

For some reason vinum believes the disks hold a mere 255MB. This is
what vinum sets the subdisk length if I specify "0m" as the length
(meaning "use all available space" according to the manual). If I
specify any larger size manually, vinum complains that there is "No
space left on device" which strikes me odd. I *believe* that the fdisk
and bsdlabel outputs reprinted below show that the disks are indeed
18G. According to my math, the appropriate size to specify in the
vinum configuration would be 35566215s, that is the number of sectors
of the smaller disks minus 265.

I see only one minor problem: The disks are not identical, with
da1 having a slightly larger capacity than da2 and da3.

Can anyone throw me a ring here?

Thanks,
Markus

fdisk da1 shows:
******* Working on device /dev/da1 *******
parameters extracted from in-core disklabel are:
cylinders=2231 heads=255 sectors/track=63 (16065 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=2231 heads=255 sectors/track=63 (16065 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 35840952 (17500 Meg), flag 80 (active)
	beg: cyl 0/ head 1/ sector 1;
	end: cyl 182/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>


fdisk da2 or da3 show:
******* Working on device /dev/da2 *******
parameters extracted from in-core disklabel are:
cylinders=2213 heads=255 sectors/track=63 (16065 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=2213 heads=255 sectors/track=63 (16065 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 35551782 (17359 Meg), flag 80 (active)
	beg: cyl 0/ head 1/ sector 1;
	end: cyl 1023/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>


bsdlabel -A da1 shows:
# /dev/da1:
type: unknown
disk: amnesiac
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 2231
sectors/unit: 35843670
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: 35843670        0    unused        0     0         # "raw" part, don't edit
  e: 35843670        0     vinum                    


bsdlabel -A da2 or da3 show:
# /dev/da2:
type: unknown
disk: amnesiac
label: 
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 2213
sectors/unit: 35566480
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: 35566480        0    unused        0     0         # "raw" part, don't edit
  e: 35566480        0     vinum                    


The vinum config file reads:
drive ibma device /dev/da1s1e
drive ibmb device /dev/da2s1e
drive ibmc device /dev/da3s1e
volume raid5 setupstate
  plex org concat
    sd length 0m drive ibma
    sd length 0m drive ibmb
    sd length 0m drive ibmc

vinum -> create vinumconfig1
3 drives:
D ibma State: up /dev/da1s1e A:0/256 MB (0%)
D ibmb State: up /dev/da2s1e A:0/256 MB (0%)
D ibmc State: up /dev/da3s1e A:0/256 MB (0%)

1 volumes:
V raid5 State: up Plexes: 1 size: 767 MB

3 subdisks:
S raid5.p0.s0 State: up D: ibma Size: 255MB
S raid5.p0.s1 State: up D: ibmb Size: 255MB
S raid5.p0.s2 State: up D: ibmc Size: 255MB

uname -a shows:
FreeBSD wutz.mininet 5.3-BETA7 FreeBSD 5.3-BETA7 #0: Sat Oct  2 21:01:00 UTC 2004     root at wv1u.samsco.home:/usr/obj/usr/src/sys/GENERIC  i386


-- 
Markus Hoenicka
markus.hoenicka at cats.de
(Spam-protected email: replace the quadrupeds with "mhoenicka")
http://www.mhoenicka.de