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Old 13th November 2008
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tangram tangram is offline
Real Name: Ricardo Jesus
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ad4: 114473MB <Seagate ST3120022A 3.04> at ata2-master UDMA100

Code:
/dev/ad4
        512             # sectorsize
        120034123776    # mediasize in bytes (112G)
        234441648       # mediasize in sectors
        232581          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        ad:3JT03PGJ     # Disk ident.

I/O command overhead:
        time to read 10MB block      0.254739 sec       =    0.012 msec/sector
        time to read 20480 sectors   9.037125 sec       =    0.441 msec/sector
        calculated command overhead                     =    0.429 msec/sector

Seek times:
        Full stroke:      250 iter in   5.730336 sec =   22.921 msec
        Half stroke:      250 iter in   4.476435 sec =   17.906 msec
        Quarter stroke:   500 iter in   7.122016 sec =   14.244 msec
        Short forward:    400 iter in   2.161611 sec =    5.404 msec
        Short backward:   400 iter in   1.193050 sec =    2.983 msec
        Seq outer:       2048 iter in   0.932468 sec =    0.455 msec
        Seq inner:       2048 iter in   0.942871 sec =    0.460 msec
Transfer rates:
        outside:       102400 kbytes in   1.964194 sec =    52133 kbytes/sec
        middle:        102400 kbytes in   2.175116 sec =    47078 kbytes/sec
        inside:        102400 kbytes in   3.431121 sec =    29844 kbytes/sec
ad10: 953869MB <SAMSUNG HD103UJ 1AA01112> at ata5-master SATA150

Code:
/dev/ad10
        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.
        ad:S13PJ1MQ602787       # Disk ident.

I/O command overhead:
        time to read 10MB block      0.180889 sec       =    0.009 msec/sector
        time to read 20480 sectors   9.345026 sec       =    0.456 msec/sector
        calculated command overhead                     =    0.447 msec/sector

Seek times:
        Full stroke:      250 iter in   6.147410 sec =   24.590 msec
        Half stroke:      250 iter in   4.646249 sec =   18.585 msec
        Quarter stroke:   500 iter in   8.820316 sec =   17.641 msec
        Short forward:    400 iter in   1.664426 sec =    4.161 msec
        Short backward:   400 iter in   2.615189 sec =    6.538 msec
        Seq outer:       2048 iter in   0.996294 sec =    0.486 msec
        Seq inner:       2048 iter in   0.995813 sec =    0.486 msec
Transfer rates:
        outside:       102400 kbytes in   1.647798 sec =    62144 kbytes/sec
        middle:        102400 kbytes in   1.619156 sec =    63243 kbytes/sec
        inside:        102400 kbytes in   1.930229 sec =    53051 kbytes/sec

Last edited by tangram; 13th November 2008 at 04:35 PM. Reason: Added another disk to the mix.
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