I was intrigued by the request that a user on XDA had made to disable the Media Scanner on System boot.

You can read about it here.

I felt his pain. Waiting minutes on end at every boot-up for the Media Scanner to complete.

Another user suggested an app called Startup Manager from the market that would kill the service at system boot thus saving your time.

The only issue was that the process to scan media files was killed so to regain the ability to rescan the system, you would have to re-enable the Media Scanner process.

You can find my app that restarts the service temporarily.

Just search for “Aditya” and use either the Rescan Media app or if you have used Startup Manager, Rescan Media ROOT.

It simply executes 2 shell commands that restart services temporarily.

If you have issues for the first time with the ROOT version,
Drop to adb shell or use a terminal emulator and type this command only once.

su

pm enable com.android.providers.media/com.android.providers.media.MediaScannerReceiver

Read this thread for anymore information.