to re-seat your e-brake pads:
1. put the car in reverse gear
2. give your car some gas so you roll backwards at idle, manuals: ride the clutch in reverse and give it a little gas to put some force on the wheels.
3. pull e-brake handle and stop car with e-brake or pull e-brake with enough force that would stall the engine if you have a manual.
frequently, when the e-brake is used when the wheels are rotating forward or there is a forward rotating force (EG: parked facing down a hill), the pads will not be pulled fully back by the springs inside, and will sit there scraping the drum until that pad material is worn away, or you re-seat them.