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Old 14th November 2009
stonecoldsed stonecoldsed is offline
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Hi,
Here is the output of an un-formatted 250GB WD RE3 drive.


Code:
ad12: 239429MB <WDC WD2502ABYS-01B7A0 02.03B02> at ata6-master SATA300
> diskinfo -c -t /dev/ad12
/dev/ad12
        512             # sectorsize
        251059544064    # mediasize in bytes (234G)
        490350672       # mediasize in sectors
        486459          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ad:WD-WCAT1A421098      # Disk ident.

I/O command overhead:
        time to read 10MB block      0.095959 sec       =    0.005 msec/sector
        time to read 20480 sectors   2.701192 sec       =    0.132 msec/sector
        calculated command overhead                     =    0.127 msec/sector

Seek times:
        Full stroke:      250 iter in   4.623722 sec =   18.495 msec
        Half stroke:      250 iter in   3.267142 sec =   13.069 msec
        Quarter stroke:   500 iter in   5.422215 sec =   10.844 msec
        Short forward:    400 iter in   2.438332 sec =    6.096 msec
        Short backward:   400 iter in   1.147096 sec =    2.868 msec
        Seq outer:       2048 iter in   0.341796 sec =    0.167 msec
        Seq inner:       2048 iter in   0.291963 sec =    0.143 msec
Transfer rates:
        outside:       102400 kbytes in   0.903144 sec =   113382 kbytes/sec
        middle:        102400 kbytes in   1.016205 sec =   100767 kbytes/sec
        inside:        102400 kbytes in   1.584498 sec =    64626 kbytes/sec
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