Is my iPad 2 a "Rev A"?
You don't have a Rev A iPad 2 — the MC979 is an iPad2,1 (16 GB White).

The Rev A iPad 2 (iPad2,4 — A1395) model numbers start with MC954 (black) or MC989 (white). They use the Apple A5 Rev A.

Source: The iPhone Wiki — Models

To view your model number, you can find it in Settings &rarr; About.