Converts an empty basic disk with the master boot record (MBR) partition style into a basic disk with the GUID partition ...

Converts an empty basic disk with the master boot record (MBR) partition     style into a basic disk with the GUID partition table (GPT) partition     style.  Syntax:  CONVERT GPT [NOERR]      NOERR       For scripting only. When an error is encountered, DiskPart                 continues to process commands as if the error did not occur.                 Without the NOERR parameter, an error causes DiskPart to exit                 with an error code.      A basic MBR disk must be selected for this operation to succeed.      Important:          The disk must be empty to convert it to a GPT disk. Back up your data,         and then delete all partitions or volumes before converting the disk.  Example:      CONVERT GPT