How long will it take for your ipod touch to reboot?

I have followed the instructions on redsn0w on how to jailbreak my ipod touch and they said that it will be a while for it to reboot, and that the longest ever was an hour. I'm waiting and its taking forever and my ipod keeps making the chime noise when your conected and the screen starts to change then it gets back to the black screen with the apple.