Does Xserve with OS 10.6.4 support multipath on non-apple storage now?

Hi,
We are installing 3 Xserves and a non-apple storage (Compellent, dual controller) at customer site, Xserve is running MAC OS 10.6.4 and have installed Xsan. One fibre cable on Xserve is connected to the fibre switch.
During test we found that if LUNs are mapped from multiple WWPNs in one WWNN, The volumes create by Xsan will have link communication and performance issue. We queried Compellent Support and got answered that Apple server doesn't support multipathing on non-apple storage so far, so we have to use only one active link per WWNN.
Is that true and is there any solution for the issue?
Thanks.

Thanks for your reply Colin,
In the Compellent Tech Tip I found following description:
MacOS may incorrectly issue commands to all Storage Center Ports with the same World Wide Node Name (wwnn), even though the volume is only mapped out of a single Storage Center Port. Commands down invalid paths will be rejected by Storage Center. MacOS may not properly acknowledge that the commands were rejected. There will be data integrity issues if the MacOS does not properly acknowledge that commands failed.
All front end primary connections from a controller will have the same wwnn, but unique World Wide Port Names (wwpn or wwn). Each controller in a clustered controller system will have a unique wwnn. Front end reserve ports will have a different wwnn than the primaries.
This behavior has been seen with Storage Center 4.0.2 and 4.1.3 along with MacOS 10.5.3 and 10.5.4. This issue is assumed to exist with all versions of Storage Center and MacOS 1.5.2-1.5.4. It could possibly affect earlier versions of MacOS.
WORKAROUND
The workaround for this issue is to ensure that a Mac Server can only view one front end primary port for each controller. This can be done through zoning. For MacOS, it is recommended that zones are setup so that a Mac Server can only see a single front end primary connection from each controller. Only a single Mac port should be used. At this time, Apple does not support multipathing with non-Apple Storage. A volume should only be mapped out of a single port on Storage Center to a single port on the Mac Server.
What my issue is I connected two active front end ports on each controller to Xserve, that made Xserve "see" two WWPNs in the same WWNN, So regarding the content above, I should connect only one active front end port to the Xserve on each controller. Do you agree?
Thanks!

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