BTW, this is not an issue if you publish all of your logical volumes to the default group in fibre channel. In that case, you would have to do LUN masking on the INITIATOR side instead of on the Open-E TARGET side. If you have QLogic initiator HBAs in Windows, then use the QLconfig utility to select the luns that should be used on each initiator. This is a pain because you have to do this on every initiator machine, but it should work.

Also, you can use the QLDirect driver for fibre channel path failover (like MPIO but no active-active, it's active-passive). This is I think the only way to do fibre channel (path) failover in Windows 2003 or earlier. (Windows 2008 has a generic Fibre channel MPIO driver, I think.)