On Sun, Dec 26, 2010 at 4:40 PM, Rogier Wolff <R.E.Wolff@xxxxxxxxxxxx> wrote: > On Sat, Dec 25, 2010 at 01:14:07PM +0100, Rogier Wolff wrote: >> Out of four partitions on the drive, two are aligned, two are not. > > Ooops. I looked wrong. Sorry. All four partitions are mis aligned. > > Roger. It sounds like you have 3 or 4 separate issues that are each costing you a factor of 3 or so of pain. 3 * 3 * 3 *3 = 81 ( I don't recall how bad your overall problem was). I can remember: Raid 5 - poor choice for 4KB random writes - a factor of 2-4 Misaligned 4KB physical sectors - a factor of 2+ Excessive Head Parking (You show 100K plus head parks in your smart data) - (who knows. It takes a while to un-park the heads and your heads are parking way too often.) I think you said it was a 8TB, I know its a pain, but I'd rebuild. I don't know how reliable various large drives are currently. in 2008/2009 they seemed to be horrible and the advice was to use drives from different vendors, etc so you would be less likely to have a batch of drives go bad all at once. Good Luck Greg -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
