FreeBSD 7.2 amd64
Code:
/dev/ipsd0
512 # sectorsize
293626445824 # mediasize in bytes (273G)
573489152 # mediasize in sectors
35838 # Cylinders according to firmware.
254 # Heads according to firmware.
63 # Sectors according to firmware.
I/O command overhead:
time to read 10MB block 0.189786 sec = 0.009 msec/sector
time to read 20480 sectors 1.913369 sec = 0.093 msec/sector
calculated command overhead = 0.084 msec/sector
Seek times:
Full stroke: 250 iter in 0.989590 sec = 3.958 msec
Half stroke: 250 iter in 2.148981 sec = 8.596 msec
Quarter stroke: 500 iter in 1.888773 sec = 3.778 msec
Short forward: 400 iter in 0.471670 sec = 1.179 msec
Short backward: 400 iter in 1.470429 sec = 3.676 msec
Seq outer: 2048 iter in 0.193860 sec = 0.095 msec
Seq inner: 2048 iter in 0.197215 sec = 0.096 msec
Transfer rates:
outside: 102400 kbytes in 1.433645 sec = 71426 kbytes/sec
middle: 102400 kbytes in 1.567306 sec = 65335 kbytes/sec
inside: 102400 kbytes in 1.566834 sec = 65355 kbytes/sec