It's a real raid adapter and the linux kernel is able to handle it with the standard ips module
I found some references in Google that seemed to indicate a "fakeraid" controller, one that depends on the driver to do the RAID calculations...
It's always up to you to decide but i'd prefer using the hw raid controller in that case of course ...
My fear is that in case of controller failure it will be difficult to find in time a controller that recognizes the particular format of the array, or that it will be too expensive. As an example, I recently tried to buy the second processor for the machine (it originally came with only one) and wanted more than 1500 dollars (yes!) for the P4 Xeon 3GHz CPU.
I am thankful for you for answers!