Wrong usb 3 speed on my WD Passport

Discussion in 'Mac Accessories' started by nbomber, Aug 25, 2013.

  1. nbomber, Aug 25, 2013
    Last edited: Aug 25, 2013

    nbomber macrumors newbie

    Joined:
    Aug 25, 2013
    #1
    My WD Passport is USB 3
    but I test on Black magic speedtest
    It show 15 - 21 MB/s

    So...next I test on Bootcamp windows 7 with HD tune
    That's work fine about 50 ~ 70 MB/s


    *Other device of USB 3 Harddisk work perfectly on mac

    What wrong with this...?
     

    Attached Files:

  2. opinio macrumors 65816

    Joined:
    Mar 23, 2013
    #2
    How full is the HDD? That could explain some of the speed loss if it is very full, although that does not explain the difference in BM and HD Tune.

    Also is it your OS X boot disk? That might explain why it is slower on an OS X App.
     
  3. nbomber thread starter macrumors newbie

    Joined:
    Aug 25, 2013
    #3

    My HDD is WD MY PASSPORT ESSENTIAL 2.5 USB 3.0 1TB
    Usage is about ~50%

    So...I'm using for back data only.
    When I'm transfer data from WD to Mac OSX.
    It's slowly look like usb 2
    Transfer file 30 GB. It take a time around 30 Minutes

    but on Bootcamp windows7 that work fine...
    The speed show correctly about ~50-70 MB/s

    Thank you for your help :)
     
  4. opinio macrumors 65816

    Joined:
    Mar 23, 2013
    #4
    Are you using the Passport through a hub?
     
  5. nbomber thread starter macrumors newbie

    Joined:
    Aug 25, 2013
    #5
    No. I connect my passport direct to USB 3 's mac port
     
  6. Giuly macrumors 68040

    Giuly

    #6
    Have a look at the System Profiler and it should tell you whether it's connected via USB 3.0 or not.
     
  7. nbomber thread starter macrumors newbie

    Joined:
    Aug 25, 2013
    #7
    Yes. It connect to usb 3 super speed bus already


     
  8. chabig macrumors 68040

    Joined:
    Sep 6, 2002
    #8
    NTFS isn't supported by Mac OX. That might be your problem.
     
  9. opinio macrumors 65816

    Joined:
    Mar 23, 2013
    #9
    How does black magic even write to the drive if it is NTFS?
     
  10. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #10
    That could be the issue, if he's using a third party driver such as NTFS for Mac by paragon, that could explain why its slower. The app is not as optimized as it should.
     
  11. hallux macrumors 68020

    hallux

    Joined:
    Apr 25, 2012
    #11
    And here I was thinking my WD My Passport drive was slow. I guess it's not...
     

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