[mythtv-users] Enable DMA

[Mitch Gore]

if i do that i get this...

[root at Mitchell_mc myth]# /sbin/hdparm -d1 /dev/sda

/dev/sda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device


On 3/23/07, Indulis Bernsteins <indulis.b at au1.ibm.com> wrote:
>
>
> > Hi,
> >
> > I am trying to enable DMA on my HD Myth box to increase performance.  It
> > works fine not but I have read so much about how DMA increases
> performance
> > so i figured I would give it a shot...
> >
> > Here is my system config
> > Chipset - SiS
> > Western Digital HDD 500GB SATA
> >
> > Heres some term output...
> >
> > [root at Mitchell_mc myth]# /sbin/hdparm /dev/sda
> >
> > /dev/sda:
> >  IO_support   =  0 (default 16-bit)
> >  readonly     =  0 (off)
> >  readahead    = 256 (on)
> >  geometry     = 60801/255/63, sectors = 976773168, start = 0
> > (I take it that DMA is not ON)
> >
> > Trying to enable it....
> > [root at Mitchell_mc myth]# echo "/sbin/hdparm -d1 /dev/hda" >>
> > /etc/rc.d/rc.local
>
> Yes you are right that when you did the "echo..." command the way you did,
> you need to reboot.  This is 'cos you added a line to the end of the file
> /etc/rc.d/rc.local (that is what >> does).  The commands in this file are
> executed during system boot.
>
> Now if you just type the command
>               /sbin/hdparm -d1 /dev/hda
>      Then it will execute right away
>
> See ya!
>
> Indulis
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>
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