I've been testing the DrivePool (Trail) for a couple of days now since I moved from WHS v1 to WHS 2011. So far, it offers all I need. The only thing is that my hard drives in the pool (3x 2TB) are not powering down when not used for 15 minutes. I'm not sure why this is, but I guess the balancer keeps balancing. Because even when I'm not accessing my server files, I see constant reads at the Pool Performance (100 KB/s to about 3 MB/s) Is this caused by the balancing, or is the software indexing or something similar?