Recently there have been some very well priced Areca controllers on ebay including:   ARC-1230, ARC-1231ML, ARC-1260, ARC-1261ML, ARC-1280, ARC-1280ML   I bought an ARC-1231ML and experienced 2 primary issues with drives connected to it.   1 - The drive names in the unRAID dropdown use a strange notation that identifies the slot on the Areca controller and not the drive. Using this number would work, but if you ever tried to move the drive to a different slot, put in a replacement drive