+# The USB mass storage class is specified in two layers: the bottom layer\r
+# is the transportation protocol. The top layer is the command set.\r
+# The transportation layer provides the transportation of the command, data and result.\r
+# The command set defines the command, data and result.\r
+# The Bulk-Only-Transport and Control/Bulk/Interrupt transport are two transportation protocol.\r
+# USB mass storage class adopts various industrial standard as its command set.\r
+# This module refers to following specifications:\r
+# 1. USB Mass Storage Specification for Bootability, Revision 1.0\r
+# 2. USB Mass Storage Class Control/Bulk/Interrupt (CBI) Transport, Revision 1.1\r
+# 3. USB Mass Storage Class Bulk-Only Transport, Revision 1.0.\r
+# 4. UEFI Specification, v2.1\r