+Reading/writing MBR/DBR.\r
+ NOTE:\r
+ If we write MBR to disk, we just update the MBR code and the partition table wouldn't be over written.\r
+ If we process DBR, we will patch MBR to set first partition active if no active partition exists.\r
+ \r
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r