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On 8/6/06, jai kumar <jaikumar1004_in@××××××××.in> wrote: |
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> I compiled my kernel again with the correct sata drivers (libata, sata_via) |
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> as module. well i guess it "dma" thing again. does sata drives not support |
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> dma or what is wrong ?? |
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They support DMA just fine.... |
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> ---------------------------------------------------------------------------------------------- |
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> flukebox@flukebox ~ $ sudo hdparm -tT /dev/sda (my whole hardisk) |
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> /dev/sda: |
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> Timing cached reads: 2592 MB in 2.00 seconds = 1295.31 MB/sec |
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> Timing buffered disk reads: 170 MB in 3.01 seconds = 56.41 MB/sec |
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...and you are getting DMA transfers. Without DMA the buffered disk |
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read speed would be more like 3-4 MB/sec. |
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This is not the problem. |
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BTW, the reason hdparm doesn't show a dma mode, and the reason that |
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most of the other hdparm options don't work with your drive, is |
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because hdparm is meant to deal with IDE/PATA disk drives, not SATA. |
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There really is no additional configuration that you need to do for |
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SATA performance. |
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AFAICT, you still haven't told us how much RAM you have, or posted |
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your emerge --info. |
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-Richard |
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-- |
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