But you can use your clustered servers like VMware's HA or MS Cluster we have videos showing this from link below and many use the DSS V6 for this setup. If you are having issues connecting from your iSCSI initiators this link below might provide some help.

http://www.open-e.com/library/webcasts-and-videos/

http://www.open-e.com/library/how-to-resources/