Slower Disk Speed Test with Yosemite!?!

Discussion in 'OS X Yosemite (10.10)' started by slo-climber, Oct 24, 2014.

  1. slo-climber macrumors member

    Joined:
    Oct 28, 2013
    #1
    Hey,

    I just updated to Yosemite and noticed decreased Disk speed.

    I have Late 2013 rMBP (16 GB Ram, 512 SSD, 2.6 GHz processor). On Mavericks speed was somewhere around 700 Mb/s both for read and write speed. Results on Yosemite are attached below. Write speed is only 346 Mb/s. Does anyone notice that too? Why this happened?

    Thanks
     

    Attached Files:

  2. crjackson2134 macrumors 68020

    crjackson2134

    Joined:
    Mar 6, 2013
    Location:
    Charlotte, NC
    #2
    It may have something to do with your OS X partition being converted to CoreStorage during the Yosemite install. Just a guess...
     
  3. petsounds macrumors 65816

    Joined:
    Jun 30, 2007
    #3
    I was seeing very slow disk access on my boot drive after installing Yosemite. After I repaired permissions and reset the PRAM, disk access is fairly good. Not as good as Mavericks, but a lot better. YMMV.
     
  4. JPamplin macrumors 6502

    JPamplin

    Joined:
    Mar 12, 2009
    Location:
    Nashville, TN
    #4
    Not experiencing this...

    2013 MBA 13" rockin the PCIe SSD. Seriously quick.
     

    Attached Files:

  5. slo-climber thread starter macrumors member

    Joined:
    Oct 28, 2013
    #5
    Thanks.

    I rebooted my computer and then speeds were the same as these on JPamplin's attachment.
     

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