Salvage Degraded Data VDEV (Maybe?)

[Stux]

@Zofran777

Also, I have to do some reading as again I have lost so much, but a snapshot is not necessarily a backup(additional copy) of the data, correct? It is just basically a history of changes? Is this typically stored on the same pool/vdev or a different one?

I demo a number of uses for snapshots and my tiered snapshot strategy in this video

TrueNAS Scale: Setting up and using Tiered Snapshots // ZFS Data Recovery

It might help your understanding