Code:
# dmesg | grep ada0
ada0 at ahcich0 bus 0 target 0 lun 0
ada0: <SAMSUNG HD103SJ 1AJ100E4> ATA/ATAPI-8 SATA 2.x device
ada0: 300.000MB/s transfers
ada0: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada0: Native Command Queueing enabled
Code:
# diskinfo -c -v -t ada0
ada0
512 # sectorsize
1000204886016 # mediasize in bytes (932G)
1953525168 # mediasize in sectors
1938021 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
S246J90Z131004 # Disk ident.
I/O command overhead:
time to read 10MB block 0.077151 sec = 0.004 msec/sector
time to read 20480 sectors 2.211735 sec = 0.108 msec/sector
calculated command overhead = 0.104 msec/sector
Seek times:
Full stroke: 250 iter in 5.234394 sec = 20.938 msec
Half stroke: 250 iter in 3.918627 sec = 15.675 msec
Quarter stroke: 500 iter in 6.541610 sec = 13.083 msec
Short forward: 400 iter in 1.145674 sec = 2.864 msec
Short backward: 400 iter in 2.402746 sec = 5.992 msec
Seq outer: 2048 iter in 0.161329 sec = 0.079 msec
Seq inner: 2048 iter in 0.216652 sec = 0.106 msec
Transfer rates:
outside: 102400 kbytes in 0.697989 sec = 146707 kbytes/sec
middle: 102400 kbytes in 0.832913 sec = 122942 kbytes/sec
inside: 102400 kbytes in 1.297791 sec = 78903 kbytes/sec