Seagate 15K.3 (SCSI) drive, about five years old:
Code:
pinot# diskinfo -c -t /dev/da0
/dev/da0
512 # sectorsize
36703934464 # mediasize in bytes (34G)
71687372 # mediasize in sectors
4462 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
I/O command overhead:
time to read 10MB block 0.143325 sec = 0.007 msec/sector
time to read 20480 sectors 4.014771 sec = 0.196 msec/sector
calculated command overhead = 0.189 msec/sector
Seek times:
Full stroke: 250 iter in 2.194760 sec = 8.779 msec
Half stroke: 250 iter in 1.737971 sec = 6.952 msec
Quarter stroke: 500 iter in 2.936857 sec = 5.874 msec
Short forward: 400 iter in 1.671453 sec = 4.179 msec
Short backward: 400 iter in 0.840368 sec = 2.101 msec
Seq outer: 2048 iter in 0.243329 sec = 0.119 msec
Seq inner: 2048 iter in 0.247530 sec = 0.121 msec
Transfer rates:
outside: 102400 kbytes in 1.402288 sec = 73024 kbytes/sec
middle: 102400 kbytes in 1.568473 sec = 65286 kbytes/sec
inside: 102400 kbytes in 2.133166 sec = 48004 kbytes/sec