Hi, No, MBR (master boot record) was setup when you Setup the drive and formated it. The files I refer to are necessary to get everything going and does use the MBR. Wouldn't hurt to copy it. Same thing as FDISK /MBR. SYS C: is the same as FORMAT C: /S. I would try to clone the drive with it setup as master and the old one as slave. Not sure you can do that, but also worth a try. What OS are you using? Jim