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Topic: turning on DMA, how can I turn DMA on during install< Next Oldest | Next Newest >
pituljica Offline





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Posted: Feb. 20 2006,11:29 QUOTE
how can I turn DMA on, during installation or after it. I need it to run some multimedia files. It works just fine when I boot it from a cd with dsl dma comand, but once I start it from hdd it shows dma turn off.

thanx for help

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Posted: Feb. 20 2006,13:33 QUOTE
If you can boot to dsl after hd install, then this next thing should work:
/sbin/hdparm -c3 -d1 -m16 -ki /dev/hda

You need to be root to do that.
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starcannon Offline





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Posted: Feb. 22 2006,01:56 QUOTE
can also append it to your LiLo config then run LiLo as Root, or append it to Grub config file.

Rob

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Xilinx Offline





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Posted: Feb. 22 2006,11:03 QUOTE
hdparm -c3 -d1 /dev/hda

Is an Amazing improved towards my disk performance!

I checked the speed with doing

Code Sample
dd if=/dev/hda of=/tmp/test.dd bs=1M count=100

dd gave me , 50Mbyte/s transfer rate

Without DMA enabled -> 5.4Mbyte/s  , :) Speed x10 :)
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starcannon Offline





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Posted: Feb. 22 2006,20:05 QUOTE
More hdparm settings and a great primer on the subject here, I already had dma going but there is so much more you can do to squeeze a very nice bit of speed out of that hard drive check it out here O'Reily hdparm Tutorial

Enjoy,
Rob

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