You don’t see too many 6-2 formations in football these days because of the advancement of spread offenses.  However, against certain teams it is a very advantageous formation if you have the personnel to run it.  Pitt was the perfect opponent to use the 6-2 against, and the Hokies certainly had the personnel to pull it off.

The 6-2 defense dates all the way back to the 1930s, if not further.  There are variants of the 6-2, but the basics are this:

Two defensive ends
Two defensive tackles
Two defensive guards
Two linebackers
Two cornerbacks
One safety

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