SAS HBA Recommendations?

[Sam Vaughan]

To complement the man pages, the supported hardware pages and what  
I've found in the archives on marc, I'd be interested to read any SAS  
HBA recommendations people might have.

I'm looking at some used Sun x4150 servers which have 8-lane PCIe  
slots but come with no built-in SAS/SATA controller.  I'd be  
interested in running RAID 10 with a hot spare and I'd like to make  
use of an OpenBSD driver that supports bioctl.  (I'm assuming OpenBSD  
runs on x4150s - the armorlogic site only lists Opteron Galaxy servers)

I'm also curious about why vastly more RAID controllers are supported  
in the i386 port than the amd64 port.  Is this because a lot of them  
aren't 64bit clean?  Do some people as a result choose to run the  
i386 port on em64t hardware?

Sam