My current setup with the Z390 Designare is working perfectly, but as I wanted to add one more SATA disk drive, I've installed a two port PCIe SATA 6Gb/s card with a JMicron JMB582 controller and it works perfectly when I run Windows, but it only detects one disk drive when I use it in macOS (now running the latest RC 21A558).
The PCI Express card shows the two ports as two separate "Generic AHCI Controller" entries in System Information > Hardware > SATA
I've connected a 120GB Kingston SSD drive and it's detected perfectly, either if I connect it to port 1 or port 2, so both ports are running in macOS.
But when I connect my new 10TB WD Red hard drive it appears as "Unknown" under Generic AHCI Controller SATA. It doesn't matter to which port I connect it.
Any ideas of why it is happening?
Both drives are working fine in Windows, the problem is with macOS.