Comparație performanțe hard-disc-uri

Că tot veni vorba despre hard-disc-uri, am zis să testez performanțele a două modele de disc-uri pe care le am instalate.

1. Hard disc Western Digital Caviar SE16 WDC WD2500KS-00MJB0, capacitate 250GB, interfață SATA 2, 16MB cache,  7200 rot/min:

/dev/ad6
        512             # sectorsize
        250059350016    # mediasize in bytes (233G)
        488397168       # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        484521          # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        WD-WCANKM102446 # Disk ident.

Seek times:
        Full stroke:      250 iter in   5.490501 sec =   21.962 msec
        Half stroke:      250 iter in   3.848383 sec =   15.394 msec
        Quarter stroke:   500 iter in   6.176014 sec =   12.352 msec
        Short forward:    400 iter in   3.174012 sec =    7.935 msec
        Short backward:   400 iter in   2.689331 sec =    6.723 msec
        Seq outer:       2048 iter in   0.281978 sec =    0.138 msec
        Seq inner:       2048 iter in   0.323706 sec =    0.158 msec
Transfer rates:
        outside:       102400 kbytes in   1.638855 sec =    62483 kbytes/sec
        middle:        102400 kbytes in   1.779411 sec =    57547 kbytes/sec
        inside:        102400 kbytes in   5.445201 sec =    18806 kbytes/sec

2. Hard disc Samsung Spinpoint F3 HD103SJ, capacitate 1TB, interfață SATA 2, 32 MB cache, 7200 rot/min:

/dev/ad8
        512             # sectorsize
        1000204886016   # mediasize in bytes (932G)
        1953525168      # mediasize in sectors
        0               # stripesize
        0               # stripeoffset
        1938021         # Cylinders according to firmware.
        16              # Heads according to firmware.
        63              # Sectors according to firmware.
        S246J9FZA11635  # Disk ident.

Seek times:
        Full stroke:      250 iter in   5.312748 sec =   21.251 msec
        Half stroke:      250 iter in   3.956796 sec =   15.827 msec
        Quarter stroke:   500 iter in   6.356040 sec =   12.712 msec
        Short forward:    400 iter in   1.277600 sec =    3.194 msec
        Short backward:   400 iter in   3.274887 sec =    8.187 msec
        Seq outer:       2048 iter in   0.126205 sec =    0.062 msec
        Seq inner:       2048 iter in   0.127727 sec =    0.062 msec
Transfer rates:
        outside:       102400 kbytes in   0.756000 sec =   135450 kbytes/sec
        middle:        102400 kbytes in   0.843101 sec =   121456 kbytes/sec
        inside:        102400 kbytes in   1.298209 sec =    78878 kbytes/sec

Se observă ușor diferențele de viteze între cele două modele. Câștigător iese Samsung Spinpoint.
Testele au fost făcute pe o mașina care rulează FreeBSD 8.1-STABLE amd64 pe hardware-ul placa de baza MSI 880GM-E41,
socket AM3, Procesor AMD Athlon II X4 640 Quad Core, 3000MHz, socket AM3, 8GB RAM (4 x 2048 MB), DDR3, 1333MHz, ValueRam).
S-a folosit comanda: diskinfo.

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