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On Wednesday 17 August 2005 18:44, Mark Knecht wrote: |
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> A quick test would be |
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> |
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> hdparm -tT /dev/hda |
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I got this: |
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/dev/hda: |
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Timing cached reads: 1344 MB in 2.00 seconds = 672.10 MB/sec |
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Timing buffered disk reads: 8 MB in 3.51 seconds = 2.28 MB/sec |
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|
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> (or whatever drive you are concerned about.) Greater than 15MB/S is |
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> almost certainly DMA but good DMA from newer drives should be |
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> 25-50MB/S |
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The second speed is evidently wrong. |
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|
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> You can look at the drives parameters using hdparm and reading through |
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> the man page to understand what all the values mean. |
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I tried to enable dma, but this happened: |
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# hdparm -d1 /dev/hda |
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|
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/dev/hda: |
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setting using_dma to 1 (on) |
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HDIO_SET_DMA failed: Operation not permitted |
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using_dma = 0 (off) |
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|
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What am I doing wrong ? some kernel option ? |
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|
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Thanks |
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-- |
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Pupeno <pupeno@××××××.com> (http://pupeno.com) |
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Reading ? Science Fiction ? http://sfreaders.com.ar |
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