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