I've tried to virtualize one of my physical servers. I have no problems doing this via Disk2vhd or Acronis Backup&Restore on many machines till now. For one of IBM servers I couldn't do this. After trying many methods of making copy of the C:\ drive, nothing worked. I've always get the BSOD saying: IRQL_NOT_LESS_OR_EQUAL. I knew that it was caused by the driver problem, but I thought that it's a rather IDE driver ( server has had SCSI disks) which was not included in my system. After adding registry entries, this didn't help too. After some more research taken, I find out that the real problem was with OSA IPMI Driver. After uninstalling it on the physical server, restarting it and making new image by disk2vhd, virtual machine started correctly!
IT Blog created to save time and nerves for admins. www.ittips.eu