I’m running Mojave (10.14.6) on an iMac. Disk Utility has found a problem on my APFS-formatted Fusion drive that it can’t fix. I want to erase my Fusion drive, reinstall Mojave (perform a clean install), and then use Migration Assistant to restore from my recent backup (SuperDuper! clone).
When I boot to macOS recovery, I’ve run Terminal and tried to execute “diskutil resetFusion” but for some unknown reason that command is not seeing my Fusion drive as something it can “reset”. I’ve also booted to an external drive and tried the same command in Terminal with the same result. I’ve spent at least three hours chatting with Apple support but they have yet to provide any solution that works.
Does anyone know the procedure to erase an APFS-formatted Fusion drive, hopefully without splitting the drive, or causing any other undesirable side effects? If I had a solution where the Fusion drive was reformatting as HFS+, I could live with that.