However if you are stuck on using Cmd to attampt to resolve this... this is how you do it
brFix /drive <num> driveinfo Display drive information
MbrFix /drive <num> drivesize Returns drive size in MB as return value
MbrFix /drive <num> listpartitions Display partition information
MbrFix /drive <num> savembr <file> Save MBR and partitions to file
MbrFix /drive <num> restorembr <file> Restore MBR and partitions from file
MbrFix /drive <num> fixmbr {/vista|/win7} Update MBR code to W2K/XP/2003, Vista or Win7
MbrFix /drive <num> clean Delete all partitions on the selected disk
MbrFix /drive <num> readsignature {/byte} Read disk signature from MBR
MbrFix /drive <num> writesignature <hex> Write disk signature to MBR
MbrFix /drive <num> generatesignature Generate disk signature in MBR
MbrFix /drive <num> readstate Read state from byte 0x1b2 in MBR
MbrFix /drive <num> writestate <state> Write state to byte 0x1b2 in MBR
MbrFix /drive <num> readdrive <startsector> <sectorcount> <file>