WCE is per-command? And 0 means no caching, so the command must complete
when the data is on the media?
> I have never heard of
> any implied requirement to flush to media when a drive receives an
> ordered tag and WCE is set. It does seem like a useful feature to have
> in the standard, but I don't think it's there.
It seems to be pretty strongly implied that things should work that way.
What is the use of being sure the write with the ordered tag is on media
if you're not sure about the writes that were supposedly supposed to
precede it? Spelling this out would indeed be helpful.
> So if one vendor implements those semantics, but the others don't where
> does that leave us?
It leaves us with a vendor we want to buy our drives from, if we want our
data to be safe.
-- Daniel - 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/