I just used DD10 to resize the D: partition on a Domain controller. the resize completed successfully but on reboot I got the following error I talked to an acronis tech and he pointed me to the same article from MS about all of the steps needed to take to fix this. I'm posting this because the fix i was able to do was not posted anywhere and it might save someone else the heart attack I just had when i saw the message. What acronis did after the resize is remove the drive letter from the partition. the server did not see D: so it gave the above error. I did the following Booted into Directory services repair mode **THIS PASSWORD WAS SET WHEN YOU INSTALLED THE SYSTEM. IF YOU CHANGE YOUR ADMIN PASSWORD THIS DOES NOT CHANGE WITH IT. MAKE SURE YOU KNOW IT** Once in safe mode I went into disk management and there was the healthy partition. I right clicked it, assigned the D: drive letter to it and rebooted. everything came up ok. I'm not sure why acronis did not preserve the drive letter. I have used DD before and never had a problem. If anyone has any ideas post up but I'm mainly posting this so if someone else has this problem this might be useful thanks to the chat techs that tried to help.