http://media.ch9.ms/ch9/4c0c/447c3abb-50bd-4c5b-a713-45eb11384c0c/DefragTools17_220.jpg In this episode of Defrag Tools, Michael Fourre, senior test engineer from the Driver Verifier team, pays a visit to Larry Larsen and Chad Beeder in the Channel 9 studios to give us some deeper insight into this valuable tool for catching device driver bugs! Resources: Debugging Tools for Windows About Driver Verifier Timeline:[00:00] Intro - Michael Fourre[01:45] New Windows 8 feature: DDI compliance checking[02:33] Verifier.exe: command line vs. GUI[03:10] Looking at a Windows 8 verifier crash[04:37] New Windows 8 verifier feature - VerifierExt.sys driver[05:39] !ruleinfo tells you what the driver did wrong[08:00] Best practices with Driver Verifier when you suspect a faulty driver[09:03] Performance impact of enabling Driver Verifier[10:37] Using !verifier in the debugger to view verifier settings and statistics[11:50] Viewing IRQL transition log with !verifier 0x8[13:13] What are IRQLs (Interrupt Request Levels)[15:41] Does Driver Verifier make drivers behave differently?[19:00] Other useful flags to use with !verifier[22:10] Viewing kernel pool allocate/free log with !verifier 0x80[22:45] Viewing IRP allocate/complete log with !verifier 0x100[23:19] Disable verifier on the fly: !verifier -disable en Fri, 24 May 2013 17:49:19 GMT Fri, 24 May 2013 17:49:19 GMT Rev9