SAS HBA boot priority

[Alessandro Bronzo]

I have this situation:
- ML330 server G3 (470062-444)
- a SCSI Ultra3 controller on PCI1 (324710-001)
- a Host Bus 8 ports SAS/SATA PCI-X on PCI2 (347786-B21)
- two SCSI disk with the operating system in RAID1 via software
- two SATA disk for storage purpose in RAID1 via hardware
The server correctly boot from the scsi disks when the SAS controller in not installed. When i instal the SAS HBA i created an array with the two sata disks and set it in RAID1. Then i specify in the SAS HBA bios that it have NOT to boot. At the reboot i configured the BIOS of the server to boot primarily from the "Hard disk C:" and then configured the "Hard disk C:" to be the HP Wide Ultra3 SCSI controller first.
When i restart the system, it boots always from the SAS controller.
How can i resolve this? I want to boot from the SCSI controller (which has not a configurable BIOS).
Thanks in advance.