Hi there,
Same problem here. Windows 10 professional fresh install, installed latest Drivepool Beta, now every 5 seconds it creates read IO on my drives, preventing it from spindown.
I've traced it back to an wmi query "Win32_EncryptableVolumeProvider"
Disabling "BitLocker_PoolPartUnlockDetect" did not solve the problem. Now i've installed the latest stable, which don't have the issue.