Getting USB 3.0 speeds out of USB 3.0 hubs?

Discussion in 'Mac Accessories' started by OneUp, Jun 25, 2013.

  1. OneUp macrumors newbie

    Joined:
    Mar 30, 2011
    Location:
    Edmond, OK
    #1
    Alright, I may be being a little obtuse, but could someone clarify this for me?

    http://support.apple.com/kb/ht5172#7

    So, on the back of late 2012 iMac there are four USB ports, if I plug in my 3.0 hub to one of them and then a couple of 2.0 devices into the others and reboot my machine, which of them is "first"? Do I have to remove all my USB devices before rebooting and then plug them back in after?
     
  2. blevins321 macrumors 68030

    Joined:
    Dec 24, 2010
    Location:
    Winnipeg, MB
    #2
    No, I think it means per port. So don't plug a USB 2.0 hub in, and then a USB 3 drive into the hub. I wouldn't think the whole controller card was affected by the first overall device.
     
  3. FreakinEurekan macrumors 68040

    FreakinEurekan

    Joined:
    Sep 8, 2011
    Location:
    Eureka Springs, Arkansas
    #3
    No, @Blevins321 has it right. HT5172 refers to items plugged into "a port", not the computer. Basically saying you can't plug a USB3 device into a USB2 hub. One would think that's obvious, but I've seen worse :rolleyes:
     
  4. errol macrumors 6502

    errol

    Joined:
    Jan 11, 2008
    #4
    Also, keep in mind that a powered hub will work better.
     
  5. OneUp thread starter macrumors newbie

    Joined:
    Mar 30, 2011
    Location:
    Edmond, OK
    #5
    Yeah, I went with this one. Right now it's the only thing plugged into the back of the iMac and all USB devices are running from it (keyboard, UPS, headset, etc). Unfortunately, I don't have any USB 3.0 devices laying around to test it with, so I can't tell if it's going to register as a USB 3.0 device or not...
     

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  6. errol macrumors 6502

    errol

    Joined:
    Jan 11, 2008
  7. opinio macrumors 65816

    Joined:
    Mar 23, 2013
    #7
    I am using a kanex USB 3.0 4 port hub with two 4tb seagate barracudas attached running in apple raid 0 and I get 260 plus mb/s read/write in black magic.
     
  8. OneUp thread starter macrumors newbie

    Joined:
    Mar 30, 2011
    Location:
    Edmond, OK
    #8
    Well, looks like speeds are going to be the last of my problems.... With the Anker USB hub connected, the iMac won't wake from sleep at all. :( Is this something typical of powered USB hubs on the Mac? Any hubs that don't cause this?
     
  9. errol macrumors 6502

    errol

    Joined:
    Jan 11, 2008
    #9
    I never used to have that problem with a powered USB 2 hub.
     
  10. HenryAZ macrumors 6502

    HenryAZ

    Joined:
    Jan 9, 2010
    Location:
    South Congress AZ
    #10
    I found this article informative about the gap between potential and realized speeds on USB 3.0.
     

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