Did you check out https://github.com/mozilla-services/syncserver?

EDIT: My bad, project is moved to https://github.com/mozilla-services/syncstorage-rs

Backblaze is a great backup solution. They publish drive stats and even show you the hardware they use.

https://www.backblaze.com/cloud-storage/resources/hard-drive-test-data

https://www.backblaze.com/cloud-storage/resources/storage-pod