XVM is an experimental service from the Student Information Processing Board which attempts to provide members of the MIT community with an easy way to create virtual machines which they can remotely administer. You can see more information about the project at http://xvm.mit.edu.
When using XVM, please remember that, while VM disks are stored on a RAID, we do not back up data, so you shouldn't rely on XVM for data integrity.
We hope you enjoy using and helping us test XVM.