To turn Spotlight Indexing off and on in Mac OS X 10.6 Snow Leopard, and to remove the Menu Bar Icon, follow these steps.
To turn Spotlight Indexing off in open Terminal and run this command:
sudo mdutil -a -i off
To turn Spotlight Indexing back on, repeat the above command, but change off to on. To remove the menu bar icon, run this Terminal command:
sudo chmod 600 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search
You’ll then to restart the menu bar with
killall SystemUIServer to see the icon vanish.