Comment 11 for bug 1866293

OK, I now know what's going on, thanks to your dmesg. Back in the pre-STX distant past we weren't managing an initramfs, so disk drivers had to be built-in. Now, the built kernel package does have a module populated initramfs, but doesn't include the out-of-tree modules that we build separately. So out-of-tree disk drivers are still a no go, not that we currently have any. Anyway, the right answer to this issue should be to simply drop both the original mptsas patch and my replacement patch and build with the two MPTSAS config options set to module:

   CONFIG_MEGARAID_SAS=y <- leave this one alone, doesn't hurt to be built in
   CONFIG_SCSI_MPT2SAS=m
   CONFIG_SCSI_MPT3SAS=m

Can you try this final test, including the installer rebuild? Thanks.