Verificarea performantei discurilor in sistemul de operare FreeBSD

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Verificarea performantei discurilor in sistemul de operare FreeBSD :

Test# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a     92G    6.6G     78G     8%    /
devfs          1.0K    1.0K      0B   100%    /dev

Test# diskinfo -cvt /dev/ad0s1a
/dev/ad0s1a
        512             # sectorsize
        102130860544    # mediasize in bytes (95G)
        199474337       # mediasize in sectors
        197891          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ad:QM00001s0s0  # Disk ident.

I/O command overhead:
        time to read 10MB block      0.068111 sec       =    0.003 msec/sector
        time to read 20480 sectors   4.471685 sec       =    0.218 msec/sector
        calculated command overhead                     =    0.215 msec/sector

Seek times:
        Full stroke:      250 iter in   0.051039 sec =    0.204 msec
        Half stroke:      250 iter in   0.249187 sec =    0.997 msec
        Quarter stroke:   500 iter in   0.127779 sec =    0.256 msec
        Short forward:    400 iter in   0.088355 sec =    0.221 msec
        Short backward:   400 iter in   0.079184 sec =    0.198 msec
        Seq outer:       2048 iter in   0.478725 sec =    0.234 msec
        Seq inner:       2048 iter in   0.449912 sec =    0.220 msec
Transfer rates:
        outside:       102400 kbytes in   0.365032 sec =   280523 kbytes/sec
        middle:        102400 kbytes in   0.365909 sec =   279851 kbytes/sec
        inside:        102400 kbytes in   0.411461 sec =   248869 kbytes/sec

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