Toshiba HDDR320E03X: 2.5" external, 320GB, 5400 rpm, 8MB cache, USB 2.0
Code:
umass0: <Toshiba External USB HDD, class 0/0, rev 2.00/1.02, addr 2> on uhub6
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Toshiba External USB HDD 1.02> Fixed Direct Access SCSI-4 device
da0: 40.000MB/s transfers
da0: 305245MB (625142448 512 byte sectors: 255H 63S/T 38913C)
Code:
$ diskinfo -ct /dev/da0
/dev/da0
512 # sectorsize
320072933376 # mediasize in bytes (298G)
625142448 # mediasize in sectors
38913 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
I/O command overhead:
time to read 10MB block 0.394168 sec = 0.019 msec/sector
time to read 20480 sectors 15.482948 sec = 0.756 msec/sector
calculated command overhead = 0.737 msec/sector
Seek times:
Full stroke: 250 iter in 6.751905 sec = 27.008 msec
Half stroke: 250 iter in 5.185917 sec = 20.744 msec
Quarter stroke: 500 iter in 8.595056 sec = 17.190 msec
Short forward: 400 iter in 4.456332 sec = 11.141 msec
Short backward: 400 iter in 4.038749 sec = 10.097 msec
Seq outer: 2048 iter in 1.578434 sec = 0.771 msec
Seq inner: 2048 iter in 1.596359 sec = 0.779 msec
Transfer rates:
outside: 102400 kbytes in 3.605207 sec = 28403 kbytes/sec
middle: 102400 kbytes in 3.674450 sec = 27868 kbytes/sec
inside: 102400 kbytes in 3.664630 sec = 27943 kbytes/sec
Seagate Momentus ST9160823AS: 2.5" internal, 160 GB, 7200 rpm, 8MB cache, SATA 300
Code:
ad4: 152627MB <Seagate ST9160823AS 3.AAB> at ata2-master SATA300
Code:
$ diskinfo -ct /dev/ad4
/dev/ad4
512 # sectorsize
160041885696 # mediasize in bytes (149G)
312581808 # mediasize in sectors
310101 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
ad:5NK09WJ7 # Disk ident.
I/O command overhead:
time to read 10MB block 0.151252 sec = 0.007 msec/sector
time to read 20480 sectors 2.180065 sec = 0.106 msec/sector
calculated command overhead = 0.099 msec/sector
Seek times:
Full stroke: 250 iter in 6.011026 sec = 24.044 msec
Half stroke: 250 iter in 4.217025 sec = 16.868 msec
Quarter stroke: 500 iter in 6.468610 sec = 12.937 msec
Short forward: 400 iter in 2.069217 sec = 5.173 msec
Short backward: 400 iter in 2.401825 sec = 6.005 msec
Seq outer: 2048 iter in 0.256851 sec = 0.125 msec
Seq inner: 2048 iter in 0.250946 sec = 0.123 msec
Transfer rates:
outside: 102400 kbytes in 1.707083 sec = 59985 kbytes/sec
middle: 102400 kbytes in 2.117032 sec = 48370 kbytes/sec
inside: 102400 kbytes in 3.322629 sec = 30819 kbytes/sec