Vmware Converter: Failed to clone Volume C:

Recently I was trying to do P2V of a Windows 2003 STD Server to ESX platform. P2V was failed with error “Failed to clone Volume” and log files had the below message. Block level cloning of the disk was failing.

ERROR -- Convert: converter.fault.CloneFault
(converter.fault.CloneFault) {
   dynamicType = <unset>,
   faultCause = (vmodl.MethodFault) null,
   description = "BlockLevelVolumeCloneMgr::CloneVolume: Detected a write error during the cloning of volume \WindowsBitmapDriverVolumeId=[9F-14-A0-14-00-7E-00-00-00-00-00-00]. Error: 4641 (type: 1, code: 290)",
   msg = "",

Did some troubleshooting on the disk level, but didn’t help.

Finally got it solved by Changing(Hardcode) the NIC Speed to 100 MBpS from Auto on the Physical system.