http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/03/23/hyper-v-snapshot-faq.aspxThere 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 easieren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/03/23/hyper-v-snapshot-faq.aspx#9508271Wed, 25 Mar 2009 23:07:55 GMT91d46819-8472-40ad-a661-2c78acb4018c:9508271Jeremy Hagan<p>Also, snapshots based on fixed vhd files basically lock away all that free space that has been pre-provisioned inside the fixed vhd. &nbsp;Snapshots are dynamically expanding by nature and running a fixed-vhd VM on a snapshot for a long time means you lose the performance benefits of fixed vhd files. &nbsp;Once you are happy to commit the data in the snapshot do so without delay, especially for production systems.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9508271" width="1" height="1">http://blogs.msdn.com/b/virtual_pc_guy/archive/2009/03/23/hyper-v-snapshot-faq.aspx#9504728Tue, 24 Mar 2009 20:21:50 GMT91d46819-8472-40ad-a661-2c78acb4018c:9504728J Y<p>I noticed that it doesn't take long to perform a delete snapshot action from the SCVMM GUI, even though the Hyper-V mmc still shows merging in progress. Seems like SCVMM allows user to interact with the VM before merging is completed. So new user requests such as starting up the VM, or creating a new snapshot would post any risk to the VM?</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=9504728" width="1" height="1">