Brian from Backblaze here: We're really transparent about our redundancy and pretty much everything we do. We use 17+3 Reed Solomon across 20 computers in 20 di

Brian from Backblaze here: We're really transparent about our redundancy and pretty much everything we do. We use 17+3 Reed Solomon across 20 computers in 20 different locations in our datacenter. You can read about it here: https://www.backblaze.com/blog/vault-cloud-storage-architecture/ https://www.backblaze.com/blog/vault-cloud-storage-architect... You can also read about our "Backblaze Storage Pods" (the things filled with drives) here: https://www.backblaze.com/blog/storage-pod/ https://www.backblaze.com/blog/storage-pod/ Also, we are the only company we know of that releases our drive failure rates. We release them quarterly, here is the most recent failure analysis: https://www.backblaze.com/blog/hard-drive-reliability-stats-for-q2-2015/ https://www.backblaze.com/blog/hard-drive-reliability-stats-...