A tale of automation woe. Read from the bottom…
A Windows 7 deployment image was accidentaly sent to all Windows machines, including laptops, desktops, and even servers. This image started with a repartition / reformat set of tasks.
As soon as the accident was discovered, the SCCM server was powered off – however, by that time, the SCCM server itself had been repartitioned and reformatted.
http://it.emory.edu/windows7-incident/