tahoe-lafs, https://tahoe-lafs.org/trac/tahoe-lafs https://tahoe-lafs.org/trac/tahoe-lafs , is "an open source, secure, decentralized, fault-tolerant, peer-to-p

tahoe-lafs, https://tahoe-lafs.org/trac/tahoe-lafs https://tahoe-lafs.org/trac/tahoe-lafs , is "an open source, secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system." It has the server-level RAID you desire. The FAQ states: ``You know how with RAID-5 you can lose any one drive and still recover? And there is also something called RAID-6 where you can lose any two drives and still recover. Erasure coding is the generalization of this pattern: you get to configure how many drives you could lose and still recover. You can choose how many drives (actually storage servers) will be used in total, from 1 to 256, and how many storage servers are required to recover all the data, from 1 to however many storage servers there are. We call the number of total servers N and the number required K, and we write the parameters as "K-of-N".'' It's a very active open source project, with full-time contributors (I think?), funded by their commercial arm, https://leastauthority.com/ https://leastauthority.com/ .