[Soekris] Booting off a Samsung CF/ATA?

Arthur van Leeuwen arthurvl at sci.kun.nl
Mon Aug 5 13:12:19 UTC 2002

On Sat, 3 Aug 2002, Arthur van Leeuwen wrote:

> On Fri, 2 Aug 2002, Lars Eggert wrote:
> > Arthur van Leeuwen wrote:
> > >>is anyone using I/O DATA compact flash cards (they are detected as
> > >>"SAMSUNG CF/ATA" by the net4521)? I can't seem to boot off them.
> > >>
> > >>I see the normal net4521 boot messages, up to "1 Seconds to automatic
> > >>boot. Press Ctrl-P for entering Monitor." Then I get a few seconds of
> > >>pause, followed by "Read error".
> > >>
> > >>Any clues?
> > >
> > >
> > > You are using GRUB, right? There seems to be a nasty interaction between GRUB
> > > and the LBA mode used by the net45{2,0}1 BIOS. As LBA is only enabled above
> > > 1024 cylinders only CF cards with more than 1024 cylinders are affected.
> >
> > No, I'm using the FreeBSD boot loader. And 256MB Lexar cards boot fine,
> > so I'm not sure if we're seeing the same issue here.
> What is the C/H/S the CF cards report? (I wouldn't be in the least bit
> surprised if the Lexar cards have less than 1024 cylinders).

> Furthermore, what exact BIOS calls does the FreeBSD boot loader use to load
> blocks off the CF? The Extended Read calls (int 0x13 service 0x42 IIRC)
> seem to break, whereas the Block Read calls (int 0x13 service 0x02 IIRC)
> seem to be okay, when using LBA. Very odd interaction there.

Okay, I checked. FreeBSD's loader uses int 0x13 service 0x02, so that is
probably not related. Still, if the CF card works in other machines there
may be some weird interaction between Soekris' BIOS and the card...

Doei, Arthur.

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