On 10/24/2016 04:51 AM, mark wrote: > Absolutely add nobarrier, and see what happens. Using "nobarrier" might increase overall write throughput, but it removes an important integrity feature, increasing the risk of filesystem corruption on power loss. I wouldn't recommend doing that unless your system is on a UPS, and you've tested and verified that it will perform an orderly shutdown when the UPS is on battery power and its charge is low.