HI,
I do not understand your setup and what you are trying to achieve. Please elaborate on your config. Do you have one physical unmirrored boot drive (C
plus additional RAID volume of multiple drives? Which RAID level?
Do you want to make an offline copy of your boot drive to be used in case the original drive dies?
P.S.
I never suceeded using xcopy to mirror the MBR. You need something that will copy on sector leve. Also, if target drive is smaller/bigger the partition needs to be resized. I have sucesfully used an utility called R-drive image which works under OS itself, so it can find the volume (not SCSI drivers at boot time needed).
P.P.S.
if you only have one drive, the best solution is probably creating a RAID-1 volume (mirrored), which will use your existing drive as a source to create a mirrored volume with two drives...