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Old 4th February 2010
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vermaden vermaden is offline
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Code:
# dmesg | grep ada0
ada0 at ahcich0 bus 0 target 0 lun 0
ada0: <SAMSUNG HD103SJ 1AJ100E4> ATA/ATAPI-8 SATA 2.x device
ada0: 300.000MB/s transfers
ada0: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
ada0: Native Command Queueing enabled
Code:
# diskinfo -c -v -t ada0
ada0    
        512             # sectorsize
        1000204886016   # mediasize in bytes (932G)
        1953525168      # mediasize in sectors
        1938021         # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        S246J90Z131004  # Disk ident.

I/O command overhead:
        time to read 10MB block      0.077151 sec       =    0.004 msec/sector
        time to read 20480 sectors   2.211735 sec       =    0.108 msec/sector
        calculated command overhead                     =    0.104 msec/sector

Seek times:
        Full stroke:      250 iter in   5.234394 sec =   20.938 msec
        Half stroke:      250 iter in   3.918627 sec =   15.675 msec
        Quarter stroke:   500 iter in   6.541610 sec =   13.083 msec
        Short forward:    400 iter in   1.145674 sec =    2.864 msec
        Short backward:   400 iter in   2.402746 sec =    5.992 msec
        Seq outer:       2048 iter in   0.161329 sec =    0.079 msec
        Seq inner:       2048 iter in   0.216652 sec =    0.106 msec
Transfer rates:
        outside:       102400 kbytes in   0.697989 sec =   146707 kbytes/sec
        middle:        102400 kbytes in   0.832913 sec =   122942 kbytes/sec
        inside:        102400 kbytes in   1.297791 sec =    78903 kbytes/sec
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