I've just had a drive report smart errors and had to shut down the machine to pull to see if it was one covered by a warranty. When I got back in after checking the drives now fully dead and the pools reported itself as unhealthy.
Problem in HexOS was the dead drive vanished completely from the UI so all I could do was expand the pool again which isn't the right thing to do.
Resolved it with a dive in to the truenas UI to see the dead drive and hit replace with the new one but the Hex UI really needs to keep the dead/removed drive in the pool so the replace button is there.
