I have Hyper-V VMs (main application server 2008 R2 on IBM and MSSQL on DELL), both virtualized in Hyper-V 2012. I have discovered some performance offset when using virtualized OS (Terminal server) and I would love to use the physical servers full power. SO after some reading, I wanted to compare the performance of virtualized local machine, to machine with OS booted from SAN directly. I believe when booting from SAN, after some hardware tweaks and adding some redundant hardware, I could get solid and expandable system. However I have a OS on VHDX from hyper V, which has plenty of informations, settings, tweaks, and I would love to transfer / migrate this OS as it is to a LUN on SAN, and boot server directly from that. I managed to connect targets, initiators, server BIOS can connect and boot from SAN, but I guess simly pointing iSCSI Target to my Hyper-V VHDX is not the way how it should be done (there must be some MBR, or iSCSI drivers missing, as I get a blue screen when windows try to boot) I could not find any information about this migration or process anywhere(some sort of easy one). If anybody can help to accomplish this would be great. Maybe my solution I am trying to reach is not the best from somebody point of view, but I would still love to test and compare the difference in performance I can get out of the hardware physical/virtualized hardware. (I am thinking of booting OS from SAN, as later I want to add second fail over Server X3850 X5, and connect them with QPI, and use as one powerfull machine, plus to centrally manage snapshots of whole OS, data etc...thanks for any comments and help.