My Setup: OpenSUSE (BTRFS with their Snappy is awesome)
Two drives that are redundant.
CrashPlan for off site backup
I also run my IRC (Weechat) on the box and glowing-bear.org as the front end and this is the BEST thing ever. Run my printer from the server and have a personal R-Studio and Juypter Notebook server running on it. I love it.
If you haven't had a failed disk yet, consider yourself lucky! :-)