Hard Drive Perf

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WD, 7200 rpm
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Sequential Read : 88.048 MB/s
Sequential Write : 69.699 MB/s
Random Read 512KB : 40.149 MB/s
Random Write 512KB : 69.042 MB/s
Random Read 4KB : 0.554 MB/s
Random Write 4KB : 1.007 MB/s

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OCZ Vertex3, solid state
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Sequential Read : 221.362 MB/s
Sequential Write : 220.076 MB/s
Random Read 512KB : 202.623 MB/s
Random Write 512KB : 199.977 MB/s
Random Read 4KB : 21.914 MB/s
Random Write 4KB : 57.040 MB/s

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WD, USB 2.0, 7200 rpm
--------------------------------------------------

Sequential Read : 27.620 MB/s
Sequential Write : 28.172 MB/s
Random Read 512KB : 20.949 MB/s
Random Write 512KB : 25.942 MB/s
Random Read 4KB : 0.612 MB/s
Random Write 4KB : 0.770 MB/s

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Seagate micro, USB 3.0, 5400 rpm
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Sequential Read : 29.525 MB/s
Sequential Write : 30.093 MB/s
Random Read 512KB : 21.548 MB/s
Random Write 512KB : 29.557 MB/s
Random Read 4KB : 0.667 MB/s
Random Write 4KB : 3.777 MB/s

Solid state drives rock. Interesting too that a USB 3.0 5400 rpm beat a USB 2.0 7200 rpm drive.

With various tweaks to settings for the solid state drive:

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no write caching
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Sequential Write : 189.780 MB/s
Random Write 512KB : 193.286 MB/s
Random Write 4KB : 58.288 MB/s

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with write caching, write buffer flushing
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Sequential Write : 220.076 MB/s
Random Write 512KB : 199.977 MB/s
Random Write 4KB : 57.040 MB/s

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with write caching, no write buffer flushing
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Sequential Write : 228.540 MB/s
Random Write 512KB : 196.989 MB/s
Random Write 4KB : 57.035 MB/s

Write caching helps, but turning off flush isn’t needed for the best performance.

Update – adding data from a new Microsoft Surface Pro – this is pretty mind blowing. The integrated Micron RealSSD C400 is freaky fast –


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Surface Pro Micron RealSSD C400
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Sequential Read : 492.928 MB/s
Sequential Write : 114.242 MB/s
Random Read 512KB : 385.979 MB/s
Random Write 512KB : 114.220 MB/s
Random Read 4KB : 20.494 MB/s
Random Write 4KB : 43.988 MB/s

Compare that to my OCZ Vertex3 above. Wow.

How does this compare to expanded storage with a 64GB Kingston MicroSD?


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Surface Pro Kingston MicroSD expansion
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Sequential Read : 37.170 MB/s
Sequential Write : 13.813 MB/s
Random Read 512KB : 33.336 MB/s
Random Write 512KB : 1.030 MB/s
Random Read 4KB : 4.162 MB/s
Random Write 4KB : 0.482 MB/s

blech.

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