MDT: Reading Log Files

Log files are placed in %SYSTEMDIR%TEMPDeploymentLogs.
Use SMS Trace to view and make sense of these files. It’s part of the SCCM 2007 Toolkit. Install only the “Common Tools”:
http://www.microsoft.com/en-us/download/details.aspx?id=9257
http://thoughtsonopsmgr.blogspot.com/2011/06/digging-through-log-files-sms-trace-is.html