Have you updated the iDRAC/LCC and BIOS, system firmware (NIC, RAID, etc.), and drivers? OS up to date? All play a role in Hyper-V running properly. What else is this server running?
Hello, I have added Hyper V role in windows 2008 R2 SP1 running on Power Edge R220, after normal reboot the windows is extremely slow, it takes 20 mins to pop up the logon screen. I found problem in the BIOS setting, when i turned off the CPU virtualization the system works normally as expected but when i turn on the virtualization option with hyper V installed the issue repeats. Now I desperately need to run hyper V on windows 2008 R2 with this machine! any solution?  You valuable suggestion and support would be life saver
Issue in booting Windows 2008 R2 after installing Hyper V in Power Edge R220