Re: WD_QUIRK_FORCE_LBA48

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

On Tue, Dec 15, 2009 at 08:26:15AM +0000, Michael van Elst wrote:
> bouyer%antioche.eu.org@localhost (Manuel Bouyer) writes:
> 
> >There are ATA-5 drives reporting LBA48 supports. LBA48 showed up before
> >ATA-6 was out (like much features in ATA world, in fact).
> 
> I think it is bogus to rely on ATA-5 specifics (LBA28 is up to 2^28)
> for devices that do not follow that standard by extending it.
> 
> Making the decision on the LBA48 capability is more likely to
> succeed. In particular, because this can only fail for a
> very rare condition and only for the last two sectors.

The fact that it's only for the last sector doesn't make the problem
less critical. Writing to the last sector using LBA48 could cause
sector 0 to be written instead, for example.

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