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This article is confusing for customers dealing with Compute servers that utilize cloud block storage for their operating system disk in Windows.
You cannot unmount the C: drive (operating system disk) using the steps outlined in this article.
Can this article be updated to mention this?
Thanks for letting us know about the issue. I've submitted an issue in the GitHub repo for that team.
Feel free to track it if you would like to know when the article has been modified.