Topic: Odd wear on rotors.

I've never seen this (photo) type of wear on brake rotors. We did have some braking issues at Sonoma. Could this be telling us why? What caused it?

Fresh Hawk HP+ pads, properly bedded in.

https://scontent-sjc2-1.xx.fbcdn.net/v/t31.0-8/18451595_1731643276849822_6650105512105595777_o.jpg?oh=edda5a9ec0aafd6cd75d857de808d427&oe=597ED699

Mike