I am looking for opinions regarding my current setup, and if the cost of running mirrored drives is worth it.
My setup consists of:
- My main PC (4x HDD)
- My TrueNAS backup server (8x HDD running mirrored pairs)
- Backblaze (Cloud backup)
I am reconsidering if it's worth running my TrueNAS drives in mirrored pairs, because expanding my storage gets expensive having to buy 3 drives at a time (1 for the main PC, 2 for the NAS). I setup my NAS this way for an extra layer of protection against failing drives (4-2-1 rule?), however the NAS is only on a few times a week for backup and contains only unused enterprise grade drives. Also Backblaze recently upgraded their restore functionality, so if any drives on my main PC were to die I could get away with restoring from the cloud instead of the NAS.
Would you consider this mirrored NAS setup to be overkill, or do you think the cost is worth the extra layer of redundancy/protection?