I recently got a few (5) hard drives to turn my home server into a NAS with trueNAS scale and my idea is to have 4 usable and 1 for redundancy, my question is… How does RAID work, like what is RAID 0, RAID 5, software RAID etc, and does any of that even matter for my use case?
Raid 5 is parity, not parody 😀. Each drive contains part of the information of the other drives, so that if any one of the drives dies, you can still get all the information (it will just be slower until you replace it and the system rebuilds the data on the new drive).