gistfile1

# diskinfo -t /dev/ad4s1f
/dev/ad4s1f
   512            # sectorsize
   25015509504    # mediasize in bytes (23G)
   48858417       # mediasize in sectors
   0              # stripesize
   2120252928     # stripeoffset
   48470          # Cylinders according to firmware.
   16             # Heads according to firmware.
   63             # Sectors according to firmware.
   CVPR1161019E040AGN   # Disk ident.

Seek times:
   Full stroke:     250 iter in   0.011747 sec =    0.047 msec
   Half stroke:     250 iter in   0.012709 sec =    0.051 msec
   Quarter stroke:     500 iter in   0.025881 sec =    0.052 msec
   Short forward:   400 iter in   0.018698 sec =    0.047 msec
   Short backward:     400 iter in   0.019790 sec =    0.049 msec
   Seq outer:   2048 iter in   0.162594 sec =    0.079 msec
   Seq inner:   2048 iter in   0.095479 sec =    0.047 msec
Transfer rates:
   outside:       102400 kbytes in   0.428345 sec =   239060 kbytes/sec
   middle:        102400 kbytes in   0.427598 sec =   239477 kbytes/sec
   inside:        102400 kbytes in   0.426799 sec =   239926 kbytes/sec