[Tested Object]
Main Board: M1 (model:WD 160GB WD1600AAJS), M2(model: GA-MA78GM-US2H AM3)
Hard Disk: H1 (model:WD 400GB WD4000AAKS-00A7B0), H2(model: ESTAR ST A880G+ HD)
Lo-Speed: 20 - 30 MByte/s
Hi-Speed: 60 - 70 MByte/s
[Test Manner]
Test Progress: write test on large volume data by random offset not in sequence
Test Manner: processed in Linux App independently made by ourselves (asynchronous I/O)
[Test Process]
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M1-H1: Lo-Speed velocity comes out
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M2-H2: Hi-Speed velocity comes out
(Paragraph 1 and 2 above are under the initialized condition as originally set up)
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M1-H2: Hi-Speed velocity comes out
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M2-H1: Hi-Speed velocity comes out
(From the initialized settings of paragraph 1 and 2, cross settings of H1, H2 with M2, M1 are made)
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M1-H1: Hi-Speed velocity comes out
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M2-H2: Hi-Speed velocity comes out
(Settings are same as paragraph 1 and 2, but the velocity comes out as Hi-Speed)
[Test Result]
Many PCs of the same model have been tested to find that;
When H1 being combined with M2, does not go through the write test process, but goes through the POST process only,
All the combinations of M1-H1, M2-H1 produce the Hi-Speed velocity.
In other words, if the process of paragraph 4(combining H1 with M2) is taken at a single time only, any combination produces the Hi-Speed velocity.
[Test Analysis]
From the above tests, followings are assumed;
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In the POST process, M2 is likely to have set up a certain value(related to speed) on to HDD
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M1 is likely to have done nothing with settings or checking
[Questions]
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What would make the above results?
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Is the POST process in the combination of M2-H1 necessarily to be taken in order to advance the velocity of HDD by M1-H1?
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Are there any utilities for advancing the HDD speed by M1-H1?
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Are there any particular settings for BIOS?
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What would be the technological issues to advise us?
[Note]
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We constantly have the same results as above with M1-H1 combination (200 units) M2-H2(100 units) in our possession.
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Still the same result from our tried tests with changed BIOS settings all relevant to HDD
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No differences are found between the two HDD even when we checked with the setting values of DMA, WCE, SCE … etc from H1 and H2 in use of the utilities as like hdparm, sdparm etc.
[PS]
We look forward to your attentive, positive and affirmative reply while above combination is being used not only by us but also by many of our customers who are with an embarrassment as above.
