User Feedback :: Problems with DSL 1.0.1



If you are getting slow IO performance, you probably don't have dma enabled.

You can either boot with:

dsl dma

or after bootup type:

sudo hdparm -d 1 /dev/hda

where hda is the device name for the desired hard drive.
Quote (cbagger01 @ May 01 2005,11:08)
If you are getting slow IO performance, you probably don't have dma enabled.

You can either boot with:

dsl dma

or after bootup type:

sudo hdparm -d 1 /dev/hda

where hda is the device name for the desired hard drive.

Thanks for the info, i assumed DMA is default!
What about CPU running at 99% when performing dd?
If you have dma turned OFF, then your CPU will spike.  I don't know of other reasons.
Quote (cbagger01 @ May 02 2005,12:53)
If you have dma turned OFF, then your CPU will spike.  I don't know of other reasons.

Unfortunately still CPU at 99% although having booted with dsl dma option and still not able to shutdown the PC...thanx for the help however!

original here.