FAST config

General config question.
I have a Fast200 attached to one pSeries server - 2 FC HBA's no switch.
This unit has 10 - 36GB disks in it.
 
When I first set it up I picked the first 5 disks and created 'array 1'.
Then I created hdisk2 on it using all of that space.
 
Later I realized I only had one controller accessing the whole raid5 hdisk2 so I see lots of IOs on that hdisk.
I believe what I should have done was create more than one logical disk (a few smaller logical disks) over the 5 disks in the raid5 container splitting the access between the 2 controllers to better load balance my IOs.  Correct?
 
I just wanted to confirm that's the better implementation.
 
Also how do I tell which hdisk is associated with which logical array?
 
Mark

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