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Take a minidump without breaking a process

Lets say you want to take a dump of an IIS application pools. Login to your server, open a command prompt, and run the following command (where the -p parameter is the PID of the application pool)

ntsd -pvr -p 1640 -c ".dump /ma /u w3wp.dmp; q"

This will popup another DOS box with a variety of ntsd debugger information flashing by. It will look like this:


The window will eventually close, and you will be left with a dump file in the root of your C: drive, like this:


You now have access to a minidump to open with WinDBG.