Set drives in the DrivePool as being already duplicated. Part of my DrivePool is a Raid-6 array (another part is RAID-1), so anything that gets put there wouldn't need to be duplicated to another disk. -- Possibly fixed if you could create Pool-in-Pool.
I'd like to be able to set individual max fill settings per drive. Some drives I don't want completely filled, but others I do.
I'd like DrivePool to understand that one of my disks is actually a cache for a CloudDrive, and not attempt to move files off of it to the CloudDrive to make space (because it won't... The files will just sit in the CloudDrive write cache for a LONG time), which sends the balancing mechanism into an endless loop of trying to empty the drive... Essentially turning the entire disk into a CloudDrive write cache.
My current DrivePool:
14 3TB drives in a RAID-6.
2 10TB drives in a RAID-1 (CloudDrive cache here).
1 63TB CloudDrive.
Not in DrivePool:
1 6TB drive (mostly empty)
1 3TB drive (half empty)
2 256GB SSD drives in a RAID-0 (mostly full)