Code:
# diskinfo -c -v -t ada0
ada0
512 # sectorsize
160041885696 # mediasize in bytes (149G)
312581808 # mediasize in sectors
0 # stripesize
0 # stripeoffset
310101 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
CVPO01160261160AGN # Disk ident.
I/O command overhead:
time to read 10MB block 0.062244 sec = 0.003 msec/sector
time to read 20480 sectors 2.370014 sec = 0.116 msec/sector
calculated command overhead = 0.113 msec/sector
Seek times:
Full stroke: 250 iter in 0.050404 sec = 0.202 msec
Half stroke: 250 iter in 0.035163 sec = 0.141 msec
Quarter stroke: 500 iter in 0.210494 sec = 0.421 msec
Short forward: 400 iter in 0.049615 sec = 0.124 msec
Short backward: 400 iter in 0.085646 sec = 0.214 msec
Seq outer: 2048 iter in 0.326711 sec = 0.160 msec
Seq inner: 2048 iter in 0.231657 sec = 0.113 msec
Transfer rates:
outside: 102400 kbytes in 0.538245 sec = 190248 kbytes/sec
middle: 102400 kbytes in 0.568161 sec = 180231 kbytes/sec
inside: 102400 kbytes in 0.550574 sec = 185988 kbytes/sec
# dmesg | grep ada0
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <INTEL SSDSA2M160G2GC 2CV102HD> ATA-7 SATA 2.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada0: Command Queueing enabled
ada0: 152627MB (312581808 512 byte sectors: 16H 63S/T 16383C)