It is using both physical links, fairly evenly. CCIE tells me that as long as the flows have different source/destination IPs that should be able to travel over both links which is what we are seeing. I will check the things you suggested.
Has anyone ever used the 3PAR CLI checkrclink command to test throughput?
I reviewed this thread at CISCO, seems to makes sense:
https://supportforums.cisco.com/thread/2075664statrcopy output:
14:12:18 02/25/2014 -Throughput(KBytes per sec)-
Target Node Address IPC Total(KBytes) Current Average
-----------------------------------------------------------------------------------
3par-mgmt-dr 0:3:1 10.xxx.xx.124 RCs05 6660091748.23 27269.32 28071.64
3par-mgmt-dr 1:3:1 10.xxx.xx.123 RCs17 6449301735.18 28220.37 29709.13
3par-mgmt-dr 2:3:1 10.xxx.xx.122 RCs21 6720985897.68 29171.32 29331.11
3par-mgmt-dr 3:3:1 10.xxx.xx.121 RCs32 6446473510.25 28927.80 29798.13
-----------------------------------------------------------------------------------
3par-mgmt-dr 26276852891.34 113588.81 116910.02
receive 0:3:1 receive RCr06 7534946.52 11.04 10.93
receive 1:3:1 receive RCr18 7233860.71 12.65 12.11
receive 2:3:1 receive RCr23 7380551.63 11.61 11.31
receive 3:3:1 receive RCr34 7253750.52 11.25 11.06
-----------------------------------------------------------------------------------
Receive 29403109.38 46.55 45.42
Send 26276852891.34 113588.81 116910.02
-----------------------------------------------------------------------------------
Total 26306256000.72 113635.36 116955.43