Comment 14 for bug 1874453

Attached are some prints and logs. lshw shows that it's using a scsi storage control with the mptspi driver. serial console logs show that initramfsless boots using a a generic scsi driver which appears to fail to load the root device. initramfs pulls in the mptspi driver properly, and things boot.

system details

host OS: Focal
vagrant: 2.2.7
virtualbox: 6.1.6_Ubuntu r137129