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Re: PIO only CF card boot

From: Felix Zielcke
Subject: Re: PIO only CF card boot
Date: Wed, 07 Oct 2009 10:47:35 +0200

Am Dienstag, den 06.10.2009, 18:08 -0600 schrieb Christopher Brooks:
> Hi,
> I’m booting off of a CF card (Kingston 32gig elite pro).  The card
> reader I’m using doesn’t support DMA, and won’t boot off of this card.
> Grub fails in stage 2 with error 25 (disk read error).  I think (not
> sure) grub is trying to use dma mode to load menu.lst in stage 2, and
> the device is timing out.  I would like to build/configure grub such
> that it doesn’t try and load menu.lst using dma mode, but instead just
> defaults to pio mode.
> Tips on how to accomplish this?  Does it seem like a reasonable
> explanation for what is happening?

GRUB Legacy isn't anymore supported by us.
Use GRUB 2.
But it also relies on the BIOS to read data from it.
Maybe you have luck and it works with it.
But maybe your BIOS is broken and that could only be avoided if we would
write a drvier for your card reader.
If it's USB you could try 
insmod uhci (or ohci depends on your USB controller)
insmod usbms
ls might show it

Felix Zielcke
Proud Debian Maintainer and GNU GRUB developer

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