Thanks Marvin.
The dealer said they had inspected the pads and they are still fine.
Dumb question:
Looking at my rotor, I see the shiny ring where the pad brushed with the rotor. Around the middle of this shiny ring, there is a .5mm ring which appears it is not being brushed. Can I assume that this is normal coz looking up images on Brake Pads in Google, I see some brake pads have a groove on the pads (escape for brake dust?) which may explain this unbrushed ring around the rotor?.