Iomega ego 1tb portable hard-drive (helium) for macbook pro

Ok, so I literally bought this hard drive 4 hours ago, and when I plugged it in I expected the hard drive to be mounted and to be able to start using it, but instead I get this message that says "its drawing too much power and one or more usb ports have been disabled in order to fix the problem" (this includes the hard drive so apparently it is using too much power). Do all portable hard drives do this with the mac book pro 15''? Also is there any known product that really works and does not require an alternative power source?