I currently have a pair of drives in RAID-0 for my "files that I care about" drive. This is backed up nightly to an external HDD onsite and another external HDD offsite.
I just realized that my "files that I care about" drive doesn't need to be fast, I just want it to be replicated. I do, however, want a fast partition for media streaming.
So I was thinking of using the existing RAID-0 array for media that doesn't need to be backed up - think common movies, music etc that can be easily replaced if it disappears. I was going to move one of my external backups into the server for a RAID-1 pair for "important" files, then also have an external HDD offsite as an additional backup.
So current setup:
5TB+5TB RAID0 + 14TB onsite external HDD + 10TB offsite external HDD
New setup:
Unimportant media: 5TB+5TB RAID0
Important files: 10TB+10TB RAID1 onsite, 14TB offsite
The only problem with this move is that if there is some mistake, say a rogue script that deletes all of my files, now I only have one backup, since RAID1 would instantly delete the files on both onsite drives.
Instead of doing RAID1 + offsite, would I be better off with nightly backups both onsite and offsite instead? That would give me a little more protection from files being deleted by some mistake, but it would add a little bit of staleness to the backup and a slight bit of complexity by having to run that backup job (but it's not a big deal, just rsync + cron)
Which do you prefer?
Or should I just buy one more disk so I have RAID1+ onsite nightly + offsite nightly?