http://blogs.msdn.com/b/ntdebugging/archive/2012/10/29/breaking-down-the-quot-cl-quot-in-irp.aspxHey there NTDEBUGGERS my name is Randy Monteleone and today we are going to talk about IRPs. In the past we have talked about the IRP structure in passing and showed a field here and there that can be pulled out and used to find answers to stalled IOen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/ntdebugging/archive/2012/10/29/breaking-down-the-quot-cl-quot-in-irp.aspx#10364854Thu, 01 Nov 2012 12:43:10 GMT91d46819-8472-40ad-a661-2c78acb4018c:10364854sergmat<p>Add post to &quot;I/O Request Packet IRP (en-US)&quot; TechNet wiki article.</p> <p><a href="http://social.technet.microsoft.com/wiki/contents/articles/6697.io-request-packet-irp-en-us.aspx" rel="nofollow" target="_new">social.technet.microsoft.com/.../6697.io-request-packet-irp-en-us.aspx</a></p> <p>[Thanks!]</p><div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10364854" width="1" height="1">http://blogs.msdn.com/b/ntdebugging/archive/2012/10/29/breaking-down-the-quot-cl-quot-in-irp.aspx#10364258Tue, 30 Oct 2012 22:07:43 GMT91d46819-8472-40ad-a661-2c78acb4018c:10364258Miroslav Reisinger<p>I always wondered about the fields you just described Randy, thanks!</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10364258" width="1" height="1">