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This has been a busy couple of days for a few of us on the team as we had a report of a bug in Windows 7. The specifics of the issue are probably not as important as a discussion over how we will manage these types of situations down the road and so it seems like a good time to provide some context and illustrate our process, using this recent example.

This week a report on a blog described a crashing issue in Windows 7. The steps to reproduce the crash were pretty easy (1) run chkdsk /r on a non-system drive then crash after consuming system memory. Because it was easy to "reproduce", the reports of this issue spread quickly. Subsequent posts and the comments across the posts indicated that the issue seemed to have been reproduced by others-that is the two characteristics of the report were seen (a) consumption of lots of memory and (b) crashing.

Pretty quickly, I started getting a lot of mail personally on the report. Like many of you, the first thing I did was try it out. And as you might imagine I did not reproduce both issues, though I did see the memory usage. I tried it on another machine and saw the same behavior. In both cases the machine functioned normally during and after the chkdsk. As I frequently do, I answered most of the mail I receive and started asking people for steps to reproduce the crash and to share system dump files. The memory usage did not worry me quite as much as the crash. I began having a number of interesting mail threads, but we didn't have any leads on a repro case nor did we have a crash dump to work with.

Of course I was not the first Microsoft person to see this. The file system team immediately began to look into the issue. They too were unable to reproduce the crash and from their perspective the memory usage was by design and was a specific Windows 7 change for this scenario (the /r flag grabs an exclusive lock and repairs a disk and so our assumption is you'd really like the disk to be fixed before you do more stuff on the machine, an assumption validated by several subsequent third party blog posts on this topic). We cast the net further and continued looking for crash dumps and reports. As described below we have quite a few tools at our disposal.



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http://blogs.msdn.com/e7/archive/2009/08/10/what-we-do-with-a-bug-repo...




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