How to get rid of Multipath on Core 13.3 without losing data?

[joeschmuck]

Multipathing After TrueNAS Scale Upgrade

I recently went through a multi-step upgrade from TrueNAS Core 13.0-U6.7 → Scale Dragonfish → ElectricEel, and while I did my best to review the release notes, I completely overlooked that my NAS is set up with multipathing to a set of 15 SAS drives. My Setup: • Drives: 15 SAS disks in an old EMC VNX DAE • Multipath: Both SAS connections from a single controller going into the disk tray • Current State: • Everything seems fine – the storage pool is happy and healthy, and all disks are visib…