# diskinfo -t /dev/ad4
/dev/ad4
	512         	# sectorsize
	2000398934016	# mediasize in bytes (1.8T)
	3907029168  	# mediasize in sectors
	3876021     	# Cylinders according to firmware.
	16          	# Heads according to firmware.
	63          	# Sectors according to firmware.


Seek times:
	Full stroke:	  250 iter in   8.320243 sec =   33.281 msec
	Half stroke:	  250 iter in   5.571028 sec =   22.284 msec
	Quarter stroke:	  500 iter in   8.884236 sec =   17.768 msec
	Short forward:	  400 iter in   2.998336 sec =    7.496 msec
	Short backward:	  400 iter in   2.951463 sec =    7.379 msec
	Seq outer:	 2048 iter in   0.349805 sec =    0.171 msec
	Seq inner:	 2048 iter in   0.366101 sec =    0.179 msec
Transfer rates:
	outside:       102400 kbytes in   0.862409 sec =   118737 kbytes/sec
	middle:        102400 kbytes in   0.943170 sec =   108570 kbytes/sec
	inside:        102400 kbytes in   1.649795 sec =    62068 kbytes/sec