Hello Roland,
Names of disk are normal. They're /dev/sda and /dev/sdb.
Controller of the disks is Intel Rapid Storage Technology enterprise on version 4.1.0.1026, which is integrated on the motherboard Intel® C612 that this server mounts.
When i change from RAID to AHCI or IDE mdadm can't see the RAID controller, but disks still don't get recognised by the installer.
Regards.