View Caged System Minor Scales Pics. The major scale is the mother of all scales and your reference point for all other scales. If you're not sure what the caged system is all about check out:

Extended Pentatonic Scale: Break Out of the Pentatonic Box
Extended Pentatonic Scale: Break Out of the Pentatonic Box from appliedguitartheory.com
The caged system makes it harder to develop your guitar speed… and makes it impossible to reach your maximum speed potential. Its definitely a good idea to learn the minor pentatonic in all caged positions. A natural minor scale is a major scale which has had its third, sixth and seventh degrees lowered by one halfstep this is called being flatted by one halfstep.

The caged system opens up many possibilities on the neck of the guitar.

Its useful for understanding chord shapes, arpeggios, and scales up and down (the majority of jazz chords such as c major 7, d minor 9, and g13 are all related to the basic chord shapes of the caged system). Note how these shapes also built off the caged octave shapes. That's why it's so important to master all of these five scale shapes. We will be using the a minor, e minor and d minor shapes that you learn in first position to play all over the neck.