There have been a lot of questions about how Hyper-V virtual machine snapshots work, and what considerations you need to take when using them.

Frankly this is an area where I need to do more blogging – and we need to work to make the technology easier to understand “out of the box”.  However – in the mean time our documentation team has put together a handy Hyper-V virtual machine snapshot FAQ that you can read here:

This details things like: How are snapshots stored?  What considerations do you need to be aware of?  Why is my virtual machine going into “paused-critical” state? and more.