5th gen AirPort Extreme external disk performance issue?

Discussion in 'Mac Accessories' started by toad77, Aug 26, 2013.

  1. toad77 macrumors member

    Joined:
    Jul 6, 2010
    Location:
    Oklahoma City
    #1
    I have a 5th generation AirPort Extreme connected to a 16-port gigabit switch and nearly everything in my house is connected via ethernet, including my Mac Mini. Attached to the AirPort, I have a 3TB external drive with its own power supply.

    When I run Blackmagic disk speed test from the Mac Mini, I'm getting a paltry 8.0 MB/s write and 8.4 MB/s read from the the external drive attached to the AirPort.

    3TB External Speed Test.png

    If I run the same test against a different external drive attached to the AirPort, I get similar results.

    Are these typical results or is something really wrong here?

    To rule out the network, I ran another test against my Synology NAS. I'm getting 37.5 MB/s write and 83.2 MB/s read.

    NAS speed test.png
     
  2. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Calif
    #2
    How do u have the hard drive attached to the AEBS?
     
  3. toad77 thread starter macrumors member

    Joined:
    Jul 6, 2010
    Location:
    Oklahoma City
    #3
    It's directly attached via USB.
     
  4. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Calif
    #4
    Yeah it's well known (i've seen a few threads about it) that speed access on the hard drive via USB is slow.
     
  5. toad77 thread starter macrumors member

    Joined:
    Jul 6, 2010
    Location:
    Oklahoma City
    #5
    My Google-fu must be on vacation. Thanks!
     
  6. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Calif
    #6
    I also have the same router and a 16GB flash drive attached to it and get the same slow results on the write/read speeds. So stick to a NAS or plug your USB drive to a computer on the network.
     
  7. ColdCase macrumors 68030

    Joined:
    Feb 10, 2008
    Location:
    NH
    #7
    The USB port on the AP extreme is for convenience only, not performance. Its intended more as a print share. A USB disk connected to a time capsule seems to work better as the TC is more disk centric, but it may still be slow compared to a quality NAS.
     

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