Powered USB hub and external hard drive

Discussion in 'Mac Accessories' started by lazyn, Nov 8, 2012.

  1. lazyn macrumors newbie

    Nov 8, 2012
    I've just bought a powered USB hub for a MacBook. I'd like to use two external HD (one of which is just used for storage) and I was wondering if I had to power these two HD.
    I don't want to do anything stupid and kill a HD!
  2. tersono macrumors 68000


    Jan 18, 2005
    Depends on the HDs and, to a degree, the hub you've bought.

    However, you won't do any damage - if there's not enough power, they simply won't mount...
  3. zObsidian macrumors member

    Nov 25, 2010
    Every USB hub that I have seen are powered (supplies power to the devices you plug into it). You might be able to check the max amount of power it supplies by checking for any wattage marks on the hub or power adapter and match it with what the hard drive power requirements are.

    Generally speaking though, most hubs are designed to provide enough power to each individual device so it should work fine.
  4. lazyn thread starter macrumors newbie

    Nov 8, 2012
    Thanks for the replies. I will check that.

    That's the opposite I'm afraid of. Would too much current do any damage?
  5. blevins321 macrumors 68030

    Dec 24, 2010
    Winnipeg, MB
    No, the device will only take as much as is required. Almost any powered (as in AC adapter to wall) would be able to power a couple bus powered drives no problem.

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