On Fri, Jan 29, 2016 at 5:14 AM, Austin S. Hemmelgarn <ahferroin7@xxxxxxxxx> wrote: > > That said, you may want to test the performance difference with the write > cache disabled, depending on how the kernel is trying to emulate write > barriers, it may actually speed things up. With all of the laptop drives I've tested, WDC Blue and Black, an HST, and Toshiba, using hdparm to disable the write cache resulting in writes becoming absolutely abysmal. Instead of ~120MB/s writes, they went to 4MB/s. Unusuable. It's so bad I'm thinking it might even be a bug. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
