if coderus' method doesn't work i would suggest doing a full reflash (rootfs +emmc) ofcourse after backing up your data and then restoring selectively to ensure that the tracker is not affected...

in my device, scanning of around 27GB of songs takes a few minutes but i've been informed it can take hours to do the same...hence, a full reflash might fix things up...


Edit: if you are doing a full reflash you might want to consider to format the VFAT partition into 4096byte blocks instead as well as to always safely remove hardware when you plug out your phone from the usb port...