I use clonezilla 126.96.36.199-amd64 on a amd dual core system with win7 and linux mint 14 installed. When I use this as a disk to disk copy sda to sdb (both disks are equal in size)it works fine except when i want to use the sdb disk as sda I always get a grub failure ending in a grub or grub rescue prompt. So each time I have to repair the grub installation in order to work again from the grub menu. Is there any possibility to avoid mentioned problems. Is clonezilla copying bit by bit ? So how can then the a.m. failure arise ? I use clonezilla each week as a complete back up sytem in addition of the daily data backup. I'll appreciate any answer which can help me in this matter.