> > > Drives should never reassign blocks on read operations, because they'd
> > > take away the chance to try to read that block for say four hours.
> >
> > Why not? If drive gets ECC-correctable read error, it seems to me like
> > good time to reassign.
>
> Because you don't know if it's just some slipped bits, a shutdown during
> write, or an actual fault. When that happens on a verify after write,
> that's indeed reasonable. Otherwise the drive should just mark that
> block as "watch closely on next write".
Or better "write back and verify". You do not want even *ECC
correctable* errors to be on your platters.
Pavel
-- "I do not steal MS software. It is not worth it." -- Pavel Kankovsky - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/