arcgis10.1如何生成MSD记录

import arcpy

mxd = arcpy.mapping.MapDocument(r"C:\test.mxd")

msd = r"C:\test.msd"

df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]

arcpy.mapping.ConvertToMSD(mxd, msd, df, "NORMAL", "NORMAL")

del mxd, msd