DMA on sata drives

On a Debian-derived distro (Kubuntu 9.04) on a Dell Inspiron (2 GHz
Intel, 2 GiB RAM), I notice that my hard drive does not have DMA
enabled:

$ sudo hdparm /dev/sda

/dev/sda:
IO_support = 0 (default)
readonly = 0 (off)
readahead = 256 (on)
geometry = 9729/255/63, sectors = 156301488, start = 0

This is my first sata hard drive, so I do not know if sata drives need
DMA or if maybe the sata controller does the copying instead of the
CPU. Googling the subject leaves me with no definite conclusion. What
say the laptop list?

Thanks!

--
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il


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Dotan Cohen wrote:
> On a Debian-derived distro (Kubuntu 9.04) on a Dell Inspiron (2 GHz
> Intel, 2 GiB RAM), I notice that my hard drive does not have DMA
> enabled:
>
> $ sudo hdparm /dev/sda
>
> /dev/sda:
> IO_support = 0 (default)
> readonly = 0 (off)
> readahead = 256 (on)
> geometry = 9729/255/63, sectors = 156301488, start = 0
>
> This is my first sata hard drive, so I do not know if sata drives need
> DMA or if maybe the sata controller does the copying instead of the
> CPU. Googling the subject leaves me with no definite conclusion. What
> say the laptop list?
>
> Thanks!
>
>
http://en.wikipedia.org/wiki/UDMA


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