Intel SR1500AL SAS/SATA RAID problem

[Rihad]

Hi,

I'm attempting to install FreeBSD 6.2 on Intel Server System SR1500AL 
with 2 SAS drives set up as RAID1. The problem is that the OS can't see 
the RAID, only the 2 separate drives. As I also had problems with Ubuntu 
Linux recognizing RAID1 on an almost twin board, but with 2 SATA disks 
instead of SAS, I asked their support forum. Someone there suggested [*] 
that ESB2 controller used by Intel is software based, and that I must 
use software RAID to make use of it. I'm not sure if I should do the 
same with FreeBSD/SAS array too? Maybe there's a ready to go driver?

Thanks.

[*] http://ubuntuforums.org/showthread.php?p=3329522#post3329522