SAN boot is supported through multiple ways on different versions of the Windows OS. These topics describe how to SAN boot a server by using the shadow copy. Shadow copy is a part of the volume shadow copy service (VSS) which is included in the Windows server 2008 R2 OS. With Shadow copy, you can take a snapshot of the data on a specific local volume on the server. After the volume is captured, you can place it on the appropriate SAN LUN as needed.