Setting up Raid 10

I am wondering if I am getting this right.  Setting up Raid 10 on a PE 1800 with PERC 4/DC.  I am doing it through the BIOS utility.

 

I assign two drives to the first array   A0-00 and A0-01

and two to the second array              A1-00 and A1-01

 

Then, I select span-1 for the first array and span-2 for the second array;

 

Then I select Raid 1 (its the only option) and Spanning = yes (its the only option here too).

 

That ends up giving me one logical disk with the capacity of approximately the two drives (146G + 146G = 290 or so, cant remember).  It shows as two stripes.  I think that means I have it set as striped and mirroed.  The BIOS interface isn't exactly intuitive though and the documentation is weak.  Anyone see any problems, or do I have it right?