. . . "Logical drives do not have MBRs, and usually you can not even perform low level operations on that drive, so I do not see how you could overwrite anything other than files over the network.(Not to be picky, but there is a difference between a volume and a partition, and it is usually volumes that are mapped, for example, DOS and Windows map volumes to drive letters such as C:\\>).They do not have MBRs t" .