Error: "HVM is Required for this Operation" when Trying to Start the VM in XenServer
                    
                
                
                    
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Article ID: CTX131386
                        
                    
                    
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Updated On: 
                    
                 
                
                    
                
                    
                    
                        
                            
Description
                        
                        
                            Example 1
When trying to start the virtual machine (VM) the following error is returned:
“There were no servers available to start VM <VM Name>”
The reason is displayed as “HVM (Hardware Virtual Machine) is required for this operation”
 Example 2
  Example 2When trying to migrate a Windows VM from one host to another gets message that "
HVM Not Supported"
 
                         
                     
                    
                    
                    
                    
                        
                            
                                
Resolution
                            
                            
                                To resolve this issue validate the processor provides support for Virtualization Technology (VT) and enable the VT flag in the system’s BIOS.
Check your server documentation in order to enable it.
Problem Cause
The XenServers hosts processor does not have the VT functionality required or it has been disabled in the system's BIOS.
                             
                         
                        
                    
                        
                            
                                
Issue/Introduction
                            
                            
                                This article contains information for users who receive the error "HVM is Required for this Operation" during some VM actions.
                            
                         
                        
                    
                        
                            
                                
Additional Information
                            
                            
                                For more information about VT please review the link provided below
http://www.intel.com/content/www/us/en/virtualization/virtualization-technology/intel-virtualization-technology.html 
 
                            
                         
                        
                    
                    
                
                    
                        
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