Datacore Software recently released a plug-n-play virtual SAN appliance for Citrix Essentials.  It was designed for virtual server environments running Microsoft Windows Server 2008 Hyper-V, Microsoft Hyper-V Server, and Citrix XenServer.
With this evaluation version you can:
Try Citrix Essentials with StorageLink Technology enabled iSCSI SAN created from your server’s internal disks. No need for new hardware! Pool up to 1 Terabyte of disk space “Thin Provision†storage to your virtual machines. See how much capacity it saves! Speed up application performance using surplus server memory to cache I/Os from the virtual SAN Snapshot: Instant Volume Cloning and Fast Disk-to-Disk Backups
System requirements:
Windows Server 2008 Hyper-V or Citrix XenServer to host the VHD image 10 GB available disk space for SANmelody Virtual Appliance Additional disk space for storage pools (up to 1 TB max) IP connection between application servers and SANmelody Virtual Appliance iSCSI initiator software required to connect application servers to SANmelody Virtual SAN Appliance DataCore Adapter for Citrix StorageLink Technology is required to use StorageLink.
