Backup and restore are a big hassle and probably not necessary since everything else seems to be working fine. I'm not sure what you mean by partition "changes". Do you mean changes to the number, location, or size of partitions or do you mean just changes to the contents (files/folders) of the partition? The contents don't matter to Parallels. Only the size and location of the partitions. NTFS mounts don't affect partition information. They are a part of the OS. I would sync the GPT and MBR. The output of the 3 commands will help decide which partition information is correct. Or use the script at http://members.shaw.ca/joevt/dumpvols2.sh.zip which will provide more information (such as boot block information).