I’m running my media server with a 36tb raid5 array with 3 disks, so I do have some resilience to drives failing. But currently can only afford to loose a single drive at a time, which got me thinking about backups. Normally I’d just do a backup to my NAS, but that quickly gets ridiculous for me with the size of my library, which is significantly larger than my NAS storage of only a few tb. And buying cloud storage is much too expensive for my liking with these amounts of storage.
Do you backup only the most valuable parts of your library?
You really shouldn’t trust anything important to a pi. I hope that you at the very least have that pi on a UPS if you’re going to risk your data this way.
It’s a backup. On the main machine there are two disks (fast & big and slow & smaller) not in raid, with a btrfs copy.
It would be quite an event to lose all three copies.