Re: WD_QUIRK_FORCE_LBA48

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Dec 07, 2009 at 08:44:30AM +0000, Michael van Elst wrote:
> mouse%Rodents-Montreal.ORG@localhost (der Mouse) writes:
> 
> >The only setups such a change would break would be those with >128G
> >drives onj non-LBA48 controllers
> 
> What are non-LBA48 controllers exactly?

LBA48 uses the same LBA registers as LBA24, you write to
the registers twice to give transfers LBA and size. Some controllers
designed before LBA48 may have unpredictable behavior with such
write sequence.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--