% diskinfo -t ada0
ada0
        512             # sectorsize
        160041885696    # mediasize in bytes (149G)
        312581808       # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        310101          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        K411T7A25WBL    # Disk ident.

Seek times:
        Full stroke:      250 iter in   7.416059 sec =   29.664 msec
        Half stroke:      250 iter in   6.277656 sec =   25.111 msec
        Quarter stroke:   500 iter in   9.508209 sec =   19.016 msec
        Short forward:    400 iter in   3.946864 sec =    9.867 msec
        Short backward:   400 iter in   4.606797 sec =   11.517 msec
        Seq outer:       2048 iter in   0.426229 sec =    0.208 msec
        Seq inner:       2048 iter in   0.364083 sec =    0.178 msec
Transfer rates:
        outside:       102400 kbytes in   2.134530 sec =    47973 kbytes/sec
        middle:        102400 kbytes in   2.940458 sec =    34825 kbytes/sec
        inside:        102400 kbytes in   5.359768 sec =    19105 kbytes/sec