Good morning.

I have recently acquired an IO CREST Dual M.2 B-Key SSD Carrier, based on the PCI Express 3.0 bus. This PCIe board reportedly employs the Jmicron JMB582 Chipset. The PCIe board seems to work perfectly: both Windows and Linux see the M.2 SATA SSDs installed in it. If I try to install Windows, the installer even attempts a setup on the first SSD (there are 2 installed, which I planned to have configured as RAID 1 in Windows). However, as the drives simply do not appear in the BIOS, booting is just not possible and I end up in some endless loop on startup.

I have used MMTool in the past (to inject CPU microcodes) and I could say I have a bit of familiarity with it. I found a Samsung M.2 ffs in another topic, but I am not sure that simply injecting that module, in a non-UEFI BIOS, would do anything good (other than possibly bricking the mobo). Shall I inject an ffs w/ Jmicron support maybe? Would that be sufficient?

Can you please help? I am kind of stuck here.