Like the title says, I have tried every combination of everything I can think of, including throttling SMART queries, changing work window settings, Direct IO etc etc, and nothing works. The system is running Server 2012 R2, and it DOES spin down the drives, but they immediately spin back up, with Scanner installed or running. If I uninstall Scanner or disable all Scanner services, the system spins down disks perfectly fine.
The system runs ~200TB in a few pools, so spinning down disks is much needed, but I also want to let Scanner do its thing. However, it doesn't seem like these two will play nicely.
Any suggestions (beyond the obvious)?