imageHere’s a KB we just published that talks about an issue where attempting to perform a virtual machine conversion using the Microsoft Virtual Machine Converter (MVMC) solution accelerator fails:

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Symptoms

Attempting to perform a virtual machine conversion using the Microsoft Virtual Machine Converter (MVMC) solution accelerator returns the following status at completion :

Microsoft Virtual Machine Converter encountered an error while attempting to convert the virtual machine.

Details:
Heads values must be between 0 and 254.
Parameter name: value
Actual value was 255.

Cause

This can occur if the virtual machine being converted has a GUID Partition Table (GPT) disk attached. MVMC supports converting virtual machines that have Master Boot Record (MBR) partitioned disks attached but not virtual machines that have GPT disks attached.

Resolution

This is by design. MVMC does not currently support GPT disks.

More Information

Sample output from the log file:
258 11/02/2012 05:59:05 +01:00 [6] Progress message: 'Converting source virtual machine 'VM01''.
259 11/02/2012 05:59:21 +01:00 [6] System.ArgumentOutOfRangeException: Heads values must be between 0 and 254.
260 Parameter name: value
261 Actual value was 255.
262 at Microsoft.Accelerators.Mvmc.Engine.Drive.MasterBootRecord.ChsTupleMemoryMap.set_Heads(Byte value)
263 at Microsoft.Accelerators.Mvmc.Engine.Drive.MasterBootRecord.ChsTupleMemoryMap.Refresh()
264 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.CreateImpl(Type type, IAddressableRange addressableRange, Boolean refresh)
265 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.ReadMemoryMap(PropertyInfo propertyInfo, WriteData writeData)
266 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.HydrateValue(PropertyInfo propertyInfo, WriteData writeData)
267 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.Refresh()
268 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.CreateImpl(Type type, IAddressableRange addressableRange, Boolean refresh)
269 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.ReadMemoryMap(PropertyInfo propertyInfo, WriteData writeData)
270 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.HydrateValue(PropertyInfo propertyInfo, WriteData writeData)
271 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.Refresh()
272 at Microsoft.Accelerators.Mvmc.Engine.IO.MemoryMap.Create[T](IAddressableRange addressableRange)
273 at Microsoft.Accelerators.Mvmc.Engine.Utilities.Helpers.UpdateDriveGeometryHelper.VerifyAndFixDriveGeometry(IDrive drive, IAddressableRange mbrAddressableRange)
274 at Microsoft.Accelerators.Mvmc.Engine.Drive.Vhd.FixedVhdDrive.UpdateFrom(IDrive source)
275 at Microsoft.Accelerators.Mvmc.Engine.ServiceLayer.DriveConversionService.ConvertVmdkToVhd(String vmdkDrivePath, String vhdDrivePath, VhdType vhdType)
276 at Microsoft.Accelerators.Mvmc.Engine.ServiceLayer.MachineConversionServiceImplementation.Phases.ConvertDisksService.ConvertDisksImpl(ISubject`1 conversionStepSubject, IDirectoryInfo2 vmdkDirectory, IDirectoryInfo2 vhdDirectory, Boolean dynamicDisks)
277 at Microsoft.Accelerators.Mvmc.Engine.ServiceLayer.MachineConversionServiceImplementation.Phases.ConvertDisksService.ConvertDisks(ISubject`1 conversionStepSubject, IDirectoryInfo2 vmdkDirectory, IDirectoryInfo2 vhdDirectory, IMachineConfiguration machineConfiguration, IOSInfo guestOS, String guestDllDirectory, Boolean dynamicDisks)
278 at Microsoft.Accelerators.Mvmc.Engine.ServiceLayer.MachineConversionServiceImplementation.Phases.ConvertDisksService.ConvertDisksToFixedVhd(ISubject`1 conversionStepSubject, IDirectoryInfo2 vmdkDirectory, IDirectoryInfo2 vhdDirectory, IMachineConfiguration machineConfiguration, IOSInfo guestOS, String guestDllDirectory)
279 at Microsoft.Accelerators.Mvmc.Engine.ServiceLayer.MachineConversionService.Convert(IMachineConversionRequest machineConversionRequest, Boolean dynamicDisks)
280 11/02/2012 05:59:21 +01:00 [6] _4127 End - Machine conversion

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For the most current version of this article please see the following:

2785521 - Microsoft Virtual Machine Converter fails with error: Heads values must be between 0 and 254

J.C. Hornbeck | Knowledge Engineer | Management and Security Division

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