On Wed, Nov 15, 2017 at 09:31:00AM -0800, Darrick J. Wong wrote: > I would evaluate these drives to find out if you really /can/ yank the > power without losing anything. > > That said, if the manufacturers aren't willing to tell you how that > feature works, I'd just as soon pretend the feature didn't exist and > continue sending flushes to the drive. > > FWIW if the drive really /does/ have a non-volatile WC then a flush > should have nearly zero overhead. (Or so you'd think...) And in that case it will report WCE=0 and Linux won't even flush. As is the case for typical enterprise disks. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
