[ale] Slow CF/Cardbus Read Rate

[Jeff Hubbs]

That's entirely possible...but here's what happens when I try to set it:

# hdparm -d1 /dev/hda

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



On Wed, Feb 18, 2009 at 3:07 PM, Greg Freemyer <greg.freemyer at gmail.com> wrote:
>
> Jeff,
>
> At that speed, I suspect your using PIO mode not DMA.
>
> You may be able to fix it via hdparm.
>
> Or you may need to use a newer kernel.
>
> Or even 2.6.29 may not have DMA support for the card in question.
>
> Greg
>
> 2009/2/18 Jeff Hubbs <jeffrey.hubbs at gmail.com>:
> > I've got a thin client here that's using a purportedly 30MB/s Sandisk CF
> > card in a CardBus/CF adapter, but I'm only getting 3.0MB/s reads as measured
> > by both dd and hdparm.  Any way I can speed that up?
> >
> > - Jeff
> >
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>
>
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