I have an LSI SAS 2308 PCIe controller that works with the MSI X570 motherboard, though you can't boot from it with the X570. However, when I replaced the LSI 2308 (FBSD-12 Hardware listing for "mps" driver) with an LSI 9341 controller (FBSD-12 Hardware listing for "Invader/Fury 12Gb/s MR controller") - the system failed to boot up. No BIOS messages, no LSI controller messages, no FBSD messages. Just a black screen and no apparent disk activity. I couldn't even get into the BIOS to see if it recognized the controller or see if there were any BIOS options available for it. SO - it was back to the LSI 2308 SAS controller and giving away the LSI 9341.
The FreeBSD Hardware Notes needs an addendum for the LSI MegaRAID SAS 9341 to clarify that it does NOT work with an MSI MEG X570 ACE motherboard (and possibly other X570 mb's).
The FreeBSD Hardware Notes needs an addendum for the LSI MegaRAID SAS 9341 to clarify that it does NOT work with an MSI MEG X570 ACE motherboard (and possibly other X570 mb's).