Portable Hard Drive not working with USB Hub?

Discussion in 'MacBook Pro' started by bestMBP15, Aug 31, 2010.

  1. bestMBP15 macrumors newbie

    Aug 31, 2010
    I recently purchased this Portable (iomega) 500GB hard drive. I just realized it only works on my Mac's USB ports, but not with my USB Hub...

    Does it exceed the power limit of the USB Hub? I don't see how it is possible, because I currently have nothing else plugged into it, and it uses a power adapter.

    It worked with my old Hard Drive, which is big and uses a power adapter. Now it doesn't seem to work. Also I tried on just a USB adapter that makes the cable longer, still doesn't work. Only the MBP ports work!

    However, the hub works for things such as phone charger, and speakers right now.

    What is the problem??

  2. alphaod macrumors Core


    Feb 9, 2008
    Some hubs, even when powered, don't allow enough power on each individual port to power a drive. That's why some drives come with dual-headed USB cables (to allow one to use 2 ports).

    Have you tried a different hub or get one of the dual-headed USB cables?
  3. bestMBP15 thread starter macrumors newbie

    Aug 31, 2010
    I don't have another hub, but I tried different ports on it. Didn't work.

    I didn't get a dual-headed USB with my hard drive, am I able to use it if I buy one separately?

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