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Old 18th December 2009
lumiwa lumiwa is offline
Package Pilot
 
Join Date: May 2008
Posts: 145
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Code:
diskinfo -c -t /dev/ad0
/dev/ad0                 
        512             # sectorsize
        80026361856     # mediasize in bytes (75G)
        156301488       # mediasize in sectors
        155061          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        WD-WCAJD1048022 # Disk ident.

I/O command overhead:
        time to read 10MB block      0.198769 sec       =    0.010 msec/sector
        time to read 20480 sectors   1.698406 sec       =    0.083 msec/sector
        calculated command overhead                     =    0.073 msec/sector

Seek times:
        Full stroke:      250 iter in   5.653904 sec =   22.616 msec
        Half stroke:      250 iter in   4.002821 sec =   16.011 msec
        Quarter stroke:   500 iter in   6.254353 sec =   12.509 msec
        Short forward:    400 iter in   2.406205 sec =    6.016 msec
        Short backward:   400 iter in   3.432481 sec =    8.581 msec
        Seq outer:       2048 iter in   0.176710 sec =    0.086 msec
        Seq inner:       2048 iter in   0.344202 sec =    0.168 msec
Transfer rates:
        outside:       102400 kbytes in   1.843513 sec =    55546 kbytes/sec
        middle:        102400 kbytes in   2.023078 sec =    50616 kbytes/sec
        inside:        102400 kbytes in   3.261300 sec =    31399 kbytes/sec
Disk is old a little more than six years.
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