Hello,
In fact I have the same problem.
The BIOS does not detect any disk drive on the SAS/SATA ports 0 - 3 whatever settings.
The only working ports are the two SATA 6 Gb/s (white connectors).
This problem occurs after a BIOS update to 02.01.0002 for Xeon E5-2600 v2 support.
Previously with the original BIOS, SAS/SATA ports 0 - 3 where working but only with hard disk
and curiously DVD-ROM or DVD-RAM drives were not detected at all.
Currently this issue limits the storage configuration to two devices (1 DVD + 1 DVD).
Any ideas or undocumented BIOS setting ?
/Paco