Hi marcolino !
Actually it does detect c=931.5G
Code:
disklabel -h wd0
# /dev/rwd0c:
type: ESDI
disk: ESDI/IDE disk
label: TOSHIBA MQ01ABD1
duid: 6057e90609059129
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 121601
total sectors: 1953525168 # total bytes: 931.5G
boundstart: 64
boundend: 1953520065
drivedata: 0
16 partitions:
# size offset fstype [fsize bsize cpg]
a: 1.0G 64 4.2BSD 2048 16384 1 # /
b: 2.2G 2097216 swap # none
c: 931.5G 0 unused
d: 4.0G 6811840 4.2BSD 2048 16384 1 # /tmp
e: 8.0G 15200416 4.2BSD 2048 16384 1 # /var
f: 2.0G 31969664 4.2BSD 2048 16384 1 # /usr
g: 1.0G 36163968 4.2BSD 2048 16384 1 # /usr/X11R6
h: 10.0G 38261120 4.2BSD 2048 16384 1 # /usr/local
i: 2.0G 59232640 4.2BSD 2048 16384 1 # /usr/src
j: 2.0G 63426944 4.2BSD 2048 16384 1 # /usr/obj
k: 300.0G 67621248 4.2BSD 4096 32768 1 # /home