Adding to boot pool, mirrored, now won't boot

[Stux]

You can mirror the boot drive after installation

Beginner: how do I make a clone/copy/something of my system (boot OS boot pool) SSD?

Well, you actually attach the SSD to the exiting boot pool. [Screenshot 2024-07-22 at 12.50.55 PM] 3 - remove the external SSD, which is now my spare boot/OS and stick it somewhere safe Yes. And once you’ve done that you can then remove the “attached” but not removed SSD from the boot pool. It will be marked as “REMOVED” but still present. If you boot with the 2nd SSD installed, it will update the mirror. The issue is that it will annoy you by saying your boot pool is degraded whilstever…