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Richard Fish wrote: |
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> On 11/26/06, Chris Walters <cjw2004d@×××××××.net> wrote: |
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>> Well, in Gentoo, the results of "hdparm -t /dev/sda" were around 65 MB / |
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>> second. dmesg shows the drive in UDMA/133 mode, and I didn't bother |
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>> with lspci. In Windows, however, the benchmarks are quite different - |
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>> around 4300-4600 KB / second. At least I know the problem is not with |
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>> the drive. |
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> |
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> Well one thing to keep in mind here is that disk throughput is not |
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> constant everywhere. That 65MB/s is on low-numbered cylinders, |
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> typically near the outside edge of the drive, where the linear |
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> velocity is highest. That same drive may only give 20-30MB/s on the |
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> inside cylinders. |
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> |
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> What are you using to benchmark the drive under windows? Is it |
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> measuring raw disk throughput, or through the NTFS filesystem? |
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> |
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> -Richard |
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|
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Hello Richard, |
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I would assume that the two benchmark programs I am using to measure the |
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drive performance under windows go through windows, and thus the NTFS |
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interface. They are Dr. Hardware and FreshDiagnose. The second one |
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showed a write speed as quoted above, and a read speed of about 280 MB |
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per second... Though the same one reported a read speed of about 900+ |
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MB per second for my USB drive (not really possible, since the maximum |
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speed for USB 2.0 is about 480 MB / second). |
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This is very frustrating. At first the drive was quite fast, under |
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windows and now it is extremely slow... I asked about this in a windows |
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xp pro group, and so far no one is touching it. |
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Regards, |
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Chris |
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