not sure if this is a naive/stupid question. If so, please apologize.
Scenario: I would like to run a small Owncloud installation on a Linux host. Encrypted data files will be saved on an external NAS. I will run backups frequently from the oC installation and database as well as of the encryption keys for each user NOT the stored data files). The users will use client software installed on Windows PCs and therefore have at least one synced copy locally available.
My question now is: Do I necessarily need a NAS with a RAID5+? What happens if the NAS dies? Can I simply hook up another NAS and things will be restored automatically (?) from the local PCs (maybe after a restart of the server)? If not, is there be a possibility to provide maximal convenience with minimal interaction for the users?
I hope this is not too confusing...