Salvage Degraded Data VDEV (Maybe?)

[winnielinnie]

@Zofran777

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?

Snapshots are a dataset property.

If you want a non-technical visual on how they work at a per-dataset level, you can check this out.