Hi....I had a comparable issue with my Rackstation RS814. Following a few hours attempting to recognize the issue I found that one of the hard drives on the cluster was awful. Shockingly the DSM framework was detailing it as "great" and "ordinary" so I was not suspecting any issues with hard drives. I saw this specific hard drive light marker was flickering more than the others, so I chose to check the "wellbeing data" of that hard drive in the capacity director and it gave me a blunder message telling it couldn't get to the drive. I didn't have any issues with different circles, so I chose to eliminate the plate from the unit. Despite the fact that the volume was in the "debased" state, everything returned to typical speed. I supplanted the terrible circle today and the framework is fixing the capacity pool, however all ordinary conduct.