Irregular rotor wear?

[Jellybean]

Noticed someting new - the left front rotor on my P5 appears to be being used on the outer 1 1/2" of the outboard rotor face. The inner ~1" is rusty - not being touched by the brake pads. Haven't seen what is happening on the inner surface. Can a rotor be warped like a cone as opposed to the "s" curve around the circumference? Is this a non-parallel condition between the caliper and rotor? Can it be corrected, or am I sol? Thanks

 

[jville]

Sounds like a sticking caliper/sliders. Nothing major, a caliper service and a resurfacing will make it good as new.