WD my passport ultra 2tb - LOW SPEED

Discussion in 'Mac Accessories' started by ressac, Nov 24, 2014.

  1. ressac, Nov 24, 2014
    Last edited: Nov 24, 2014

    ressac macrumors regular

    Oct 30, 2011
    hello i've bought today subject, and tried on mac os 10.9.5
    speed write or read is REALLY LOW, 30mb/s
    yes i did install all stuff, like drivers, wd software etc...
    smart test look good, i formatted drive few times already, but speed is so poor ((
    any solution? or tips?

    p.s. MacBook Pro (13-inch Late 2011)

    Attached Files:

  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    Your 2011 model only has USB2, so those speeds look about right.
  3. ressac thread starter macrumors regular

    Oct 30, 2011
    you're right

    but i've tried this hdd on windows 7 machine with core 2 duo and mobo asus p5k-e which is 6-7 year old

    and there 10mb/s plus on read/write --> 42 mb/s read 35 mb/s write
  4. Boyd01 macrumors 68040


    Feb 21, 2012
    New Jersey Pine Barrens
    I have several of the USB2 passport drives. They clock around 35MB/s write on my 2013 MBA (with USB3 interface). Your speeds seem a little slow, but if the drive is fragmented that could explain it. What drivers did you install? I don't think any should be necessary. Is your drive formatted for MacOSX?

    Now it's interesting, these same drives are much faster on my Windows machine (i5, Win 7 Pro), maybe 60 MB/s. I wonder if this is due to the windows FAT32 formatting, since it doesn't do journaling like MacOSX?

    I also have a passport ultra, like yours. With USB3 on my MBA, it clocks over 100 MB/s.
  5. ImBuz macrumors 6502


    Oct 23, 2014
  6. ressac thread starter macrumors regular

    Oct 30, 2011
    i did all test after format hdd, so it was completely empty.

    yes drivers give a some boost to speed, for example on win7 it was pretty same as on mac, but after install wd ses driver it gives reading 42mb/s, writing 32mb/s
    same goes on mac driver wd +turbo driver but in this case boost was just a tiny, about 3-5 mb/s in writing and reading maybe 3mb/s more

    i've done different variation of tests with different file systems on hdd, and in my case speed remains same:
    win7 - fat32 and ntfs - speed was same
    mac os - fat32 - hfs+ - speed was same

    as a conclusion, i think it all about mbp mobo controller, but i cant be sure about this 100% because i didn't test hdd from windows on mbp.


    which model of mbp? and external hdd?
  7. ressac thread starter macrumors regular

    Oct 30, 2011
    just tested hdd speed again , and speed changed to better

    i don't know why it's faster than yesterday, all i did it's to check for bad sectors using WD Drive Utilities.

    Attached Files:

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