Right now I have about 20 3.5" sata hard drives in my house where a third are essentially duplicates of the others for back up purposes. When I want to access them I drop one or more into a usb attached drive toaster to my imac. This is a cumbersome way to get at my files for one, and I would like a solution similar to unraid like a DIY drobo so I can use all these hard drives more efficiently. I have a few ideas I would like commented on by those with more experience then I have with this. I would love to put all these drives in a headless server connected to my mac and essentially use it like a NAS. I want to build this on the cheap. I would like a solution like unraid, but unraid only has single parity. Is there a solution similar to unraid out there that uses double parity and is as easily expandable as unraid? Should I make it a hackintosh? Should I put a linux distro on it? I'd love some ideas. I'd like to get away from using the drive toaster so I have an easier way to access, manage, and back up my drives, that's easy to use headlessly. Thanks!