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.