http://virtualizationreview.com/articles/2012/01/03/2012-buyers-guide.aspx#StorageVirt
Storage Virtualization Based on the strength of its storage hypervisor approach, DataCore SANsymphony-V 8.1 was chosen by Virtualization Review as a 2012 Readers Choice a Preferred Product Award Winner for storage virtualization. EMC, NetApp and DataCore Software were the top 3 chosen by the readership.