da0: <SAMSUNG SP0802N 0000> Fixed Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: 76351MB (156368016 512 byte sectors: 255H 63S/T 9733C)
Code:
/dev/da0
512 # sectorsize
80060424192 # mediasize in bytes (75G)
156368016 # mediasize in sectors
9733 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
I/O command overhead:
time to read 10MB block 0.653984 sec = 0.032 msec/sector
time to read 20480 sectors 15.376827 sec = 0.751 msec/sector
calculated command overhead = 0.719 msec/sector
Seek times:
Full stroke: 250 iter in 5.690934 sec = 22.764 msec
Half stroke: 250 iter in 4.177804 sec = 16.711 msec
Quarter stroke: 500 iter in 6.369803 sec = 12.740 msec
Short forward: 400 iter in 3.462061 sec = 8.655 msec
Short backward: 400 iter in 2.018708 sec = 5.047 msec
Seq outer: 2048 iter in 1.563425 sec = 0.763 msec
Seq inner: 2048 iter in 1.564339 sec = 0.764 msec
Transfer rates:
outside: 102400 kbytes in 6.454496 sec = 15865 kbytes/sec
middle: 102400 kbytes in 6.438555 sec = 15904 kbytes/sec
inside: 102400 kbytes in 6.440142 sec = 15900 kbytes/sec