[Solved] Enable DMA after upgrade?

[andrewyoungisgreat]

I've just upgraded from 7.04 to 8.04, but I'm experiencing a lot of system slow downs. I think I've tracked this down to a lack of DMA on hda.

$ sudo hdparm -d1 /dev/hda

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma  = 0 (off)

I have an IDE and a SATA hard drive as well as an IDE DVD writer connected.

What else can I try?

[Argos]

Re: Enable DMA after upgrade?

Beside the HDD access , you can try these other things i just found, that can significantly improve your system. i know, i did them myself...
They were written for Feisty, but i found them affective and useful in Hardy as well.

Speeding up Ubuntu - http://yoten.blogspot.com/2007/04/speed-up-ubuntu.html
“Fly Like A Butterfly” - http://www.xlntsolution.com/index.ph...erfly/#more-26
Slim Down and Speed Up Linux - http://lifehacker.com/software/featu...nux-333798.php
Speeding up Linux Using hdparm - http://linuxdevcenter.com/pub/a/linu...29/hdparm.html

[andrewyoungisgreat]

Re: Enable DMA after upgrade?

I found a piece of metal shorting several of the pins of the PATA HD. Since I removed it, all my HD problems have gone away.