SoftRAID disk size

Hi,

I have two 5TB disks, which I want to set up as mirrored using RAID 1
through softraid(4). But after attaching the disk using bioctl(8), the
disk appears with 2TB, not 5TB.

How can I get the correct size for the softraid device?

The disks are wd0 and wd2, and disklabel shows:

# /dev/rwd0c:
type: ESDI
disk: ESDI/IDE disk
label: TOSHIBA HDWE150
duid: f76030f4c8b1cf43
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 608001
total sectors: 9767541168
boundstart: 64
boundend: 9767541168
drivedata: 0

16 partitions:
# size offset fstype [fsize bsize cpg]
a: 9767541104 64 RAID
c: 9767541168 0 unused

# /dev/rwd2c:
type: ESDI
disk: ESDI/IDE disk
label: TOSHIBA HDWE150
duid: 635ad6956b23ea1d
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 608001
total sectors: 9767541168
boundstart: 64
boundend: 9767541168
drivedata: 0

16 partitions:
# size offset fstype [fsize bsize cpg]
a: 9767541104 64 RAID
c: 9767541168 0 unused


But when I attach using:

# bioctl -c 1 -l /dev/wd0a,/dev/wd2a softraid0
softraid0: RAID 1 volume attached as sd0

dmesg shows:

sd0 at scsibus3 targ 1 lun 0: <OPENBSD, SR RAID 1, 006> SCSI2 0/direct fixed
sd0: 2097148MB, 512 bytes/sector, 4294961093 sectors

Thanks in advance to any pointers in the right direction.

Best regards,
—Håkon