Can anyone recommend a decent RAID controller for SAS

(1) That runs out of the box
(2) That does NOT stop working on Kernal updates
[ at least in your experience upto now... who knows in the future]
[ I probably won't do updates once installed in production life
for fear of breaking it ... unless a mega security fix is required ]
(3) I only need RAID 1 support

Server will support 20-25 users fairly active users with CAD files

I have LSI megaraid 8208ELP and Teckram Fastrak 4650 - neither of these seem
to work
I've downloaded latest drivers and installed

Someone suggeted Adaptec 6504 or HP Smart Array 462828-B21 - both work on
REDHAT not tried on SLES