Odd fdisk output

[Mike Ayers <mike.ayers@earthling.net>]

	Ogle this:

# mount
/dev/wd0a on / type ffs (local)
# df -k
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/wd0a     5082221   804430  4023680    17%    /
# disklabel wd0
# /dev/rwd0c:
type: ESDI
disk: ESDI/IDE disk
label: WDC WD800JB-00FS
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 16383
total sectors: 156301488
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # microseconds
track-to-track seek: 0  # microseconds
drivedata: 0

16 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
   a: 10497808        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 10414*)
   b:  2097152 10497808      swap                        # (Cyl. 10414*- 12494)
   c: 156301488        0    unused        0     0        # (Cyl.    0 - 155060)
# fdisk wd0
Disk: wd0       geometry: 9729/255/63 [156296385 Sectors]
Offset: 0       Signature: 0xAA55
          Starting       Ending       LBA Info:
  #: id    C   H  S -    C   H  S [       start:      size   ]
------------------------------------------------------------------------
  0: 00    0   0  0 -    0   0  0 [           0:           0 ] unused
  1: 00    0   0  0 -    0   0  0 [           0:           0 ] unused
  2: 00    0   0  0 -    0   0  0 [           0:           0 ] unused
  3: 00    0   0  0 -    0   0  0 [           0:           0 ] unused
#


	This system boots and runs fine, but I don't understand why.  My problem is 
with the zeroed partition table.  Is this just a standard way to indicate a 
single partition disk, or is something funky going on here?


	Thanks,

/|/|ike