It's done over the network, the data is always sent to the initiator connection making the request.   So if the connection is made to Member A, and the data is on Member B, member B sends the data to Member A and it gets passed to the Xen server.  OS's that support our HIT kit will make direct connections to each member automatically.  So that extra hop won't be needed.  Unfortunately, Xen is not supported right now. 
Hi, Can someone help explain how the following would work?  I have a  volume (vol 1) spread across multiple arrays (array A and array B) which is being servers up by controller A and eth0. The group IP address of the cluster is 10.10.10.10 The eth0 interface in array A has the IP address 10.10.10.11 The eth0 interface in array B has the IP address 10.10.10.21 I have a XenServer trying to access this volume via the iscsi target.  The XenServer needs a block that is on both array A and a block on array B.  What IP address would pass these blocks to the XenServer. Would it be the group IP, array A's IP address or array B's IP address? Or both A and B's IP address depending on what device has the block for Vol 1?  Many thanks Oli 
iscsi target for a volume that is spread across multiple arrays