This is the lspci output for the only pci device that looks like a RAID controller:
# lspci -nn -k -s 00:1f.2
00:1f.2 RAID bus controller [0104]: Intel Corporation 6 Series/C200 Series Desktop SATA RAID Controller [8086:1c04] (rev 05)
Subsystem: Hewlett Packard Enterprise Device [1590:006c]
Kernel driver in use: ahci
Kernel modules: ahci
Frankly I do not know what I am looking at here. I am not even sure if this is the same device as the HP B120i controller. So there is a kernel module dealing with this device, but I don’t know what is does and the RAID still doen’t work