I currently have 1x8TB data,1x5TB backup
1x8TB new spare
I was using daily snapshots and replication for data redundancy.
Now my backup is full, so I need to do something
the disks all show vdev 1x disk no redundancy
I had a bad experience with linux mirror many years ago when the hdd failed and the mirror copy was corrupted as a result. Hence, why I avoid mirroring.
according to chatgpt, it says I should mirror with the 2x8TB drives and that zfs doesn’t have the risk of corruption on the 2nd drive like what happened to me with ext4. It says I should be able to attach a new drive to the existing data volume, but I don’t see this option anywhere.
ZFS mirrors are very solid. I can recommend them for your situation. ext4 itself doesn’t have any mirror or raid capability, so you either had a hardware raid or a software raid like dmraid. In my opinion ZFS mirrors are a lot better than that.
I made some screenshots a while back on how to create a mirror:
