So first things first I have already performed the upgrade and all is well with one exception. Prior to performing the upgrade I did not decouple the fusion drive. I've since read that was a good first step...now the machine doesn't detect the HDD. It only detects the new blade SSD. I've installed Catalina and all is well except the HDD. I'd like to enable the HDD for the extra internal storage without coupling the new Blade SSD and the HDD. I'm open to any suggestions. So far I've tried:
- detecting the HDD from Disk Utilities
- listing the linked drives via diskutil from terminal (doesn't exist)
- listing the linked drives via diskutil from terminal in Recovery Mode (doesn't exist)
- Swapping the HDD with a known good HDD