app to test speed of my usb ports?

Discussion in 'Mac Apps and Mac App Store' started by djsound, Feb 24, 2012.

  1. djsound macrumors 6502a

    djsound

    Joined:
    Dec 4, 2006
    #1
    is there an app to make sure my usb ports/cables are up to speed.? my external drive seems slow so I want to make sure its operating at the correct speed....or make sure my cable isn't bad. its on a late '06 iMac. thanks
     
  2. atticus18244fsa macrumors 6502

    atticus18244fsa

    Joined:
    Jul 11, 2008
    Location:
    Waterloo, ON
    #2
    There's a free app on the Mac App Store called "Blackmagic Disk Speed Test" that allows you to test the speed of a hard drive. If you want to test the speed of an external drive go to File->Change Target Drive and select your external.
     
  3. djsound, Feb 25, 2012
    Last edited: Feb 25, 2012

    djsound thread starter macrumors 6502a

    djsound

    Joined:
    Dec 4, 2006
    #3
    thanks much!

    hmmm I ran it but I have no idea how to make sense of this info =)
     
  4. lostless macrumors 6502

    Joined:
    Oct 22, 2005
    #4
    also realize USB2 is not very efficient with large data transfers. The theoretical max speed may be 480mb/s but USB has to ask the CPU every time it wants to wright or read which slows things down. Especially when you transfer a lot of small files. Plus you share that bandwidth with all devices on the USB bus.
     
  5. djsound thread starter macrumors 6502a

    djsound

    Joined:
    Dec 4, 2006
  6. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #6
    That is the correct speed, I get 35 to 37 MB/s.
     

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