12" MacBook SSD Speed - Any issues with slow speed?

Discussion in 'MacBook' started by duky, Apr 15, 2015.

  1. duky macrumors 6502

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    North Carolina
    #1
    So I just got my MacBook a few hours ago and am noticing some strange SSD behavior, specifically slower speeds than my Fusion iMac in installing apps and I'm not sure what's going on. I thought we should be seeing read speeds in excess of 1k but instead I'm getting the attached when using Blackmagic. Apps seem to launch okay but it all doesn't seem any faster than my iMac.

    My unit is a 1.2 GHz 512GB SSD. Any similar issues?
     

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  2. newellj macrumors 601

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    #2
    Write speed seems very slow. Yosemite does a lot of indexing and maintenance in the background during the first day or so. I wonder if that's responsible for the results you got.
     
  3. duky thread starter macrumors 6502

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    #3
    I'm going to keep an eye on it and report back but it was just surprising because usually installs are blazing fast on my SSD machines. We shall see...
     
  4. thadoggfather macrumors 604

    thadoggfather

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    #4
    is it indexing spotlight or do you have filevault turned on?
     
  5. duky thread starter macrumors 6502

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    #5
    I do have FileVault enabled. Does that make things slower?
     
  6. thadoggfather macrumors 604

    thadoggfather

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    #6
    Indeed. Can't speak from experience, but someone else had "slow" IO with it. Maybe just while its initially encrypting the data? dunno.
     
  7. duky thread starter macrumors 6502

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    #7
    Ah I see, reading that online now too. I'll give it time and see what happens
     
  8. newellj macrumors 601

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    #8
    FileVault shouldn't have anywhere near that impact unless it is in the process of encrypting. I have had FileVault set up on my rMBP and get speeds far faster than your read speed.
     
  9. unibility macrumors 6502

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    Apr 6, 2012
    #9
    I do not own a MacBook but those numbers seem pretty slow. Here's my reads from my 2015 11" Air.

    MacBook Air (11-inch, Early 2015)
    Processor Intel i7 2.2 Ghz Dual-Core
    Memory 8 GB 1600 MHz DDR3
    SSD APPLE 512 GB SSD SM0512G Media
     

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  10. clyde2801 macrumors 601

    clyde2801

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    #10
    Indexing?

    Hit the searchbar in the far right hand corner. If it says indexing, its, well...indexing, and that could explain slow speed.
     
  11. Traverse macrumors 603

    Traverse

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    #11
    FV has almost no effect once it's completed. Or it shouldn't.
     
  12. garyleecn macrumors 6502a

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    #12
    just tested, i only get 80m write!

    not connected to battery, spotlight indexing finished. file vault enabled.
     
  13. newellj, Apr 15, 2015
    Last edited: Apr 16, 2015

    newellj macrumors 601

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    #13
    Those are actually about 2x too high for anything other than the 2015 models with the 4-lane PCI-e. The rMB has 2-lane, but it should be roughly half of that, not the very slow read speeds the OP shows.

    I just ran my 1.2/512. I got around 450mb/s read and 790mb/s write.

    [​IMG]
     
  14. dexterbell macrumors 6502a

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    #14
    Heres mine, base model MacBook
     

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  15. newellj macrumors 601

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    #15
    For clarification, mine is a 1.2 with FV2 turned on (encryption clearly not having a major effect on this).
     
  16. TheBuffather macrumors 6502

    TheBuffather

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    Location:
    Orlando, FL
    #16
    No way those results are correct. Here's my results:

    MacBook Pro Retina 2012
    Intel Core i7 2.7GHz
    16GB Ram 1600MHz DDR3
    512GB Storage Apple SSD SM215E
     

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  17. unibility macrumors 6502

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    #17
    As the previous poster indicated the 2015 MacBook Airs carry a 4-lane PCI-e where previous models only carry a 2-lane PCI-e. My mid-2014 15" MacBook Pro are 1/2 that speed.

    See link: http://forums.macrumors.com/showthread.php?t=1860124
     
  18. garyleecn macrumors 6502a

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    #18
    was getting 50-80m write, just re-installed the OS, getting 400+ write now.
     
  19. newellj macrumors 601

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    #19
    OP, what version of OS X are you running?
     
  20. brotato macrumors newbie

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    Mar 11, 2010
    #20
    My base gold is having the same issue. I enabled FV2 during setup but disabled it after originally seeing these speeds. Checked activity monitor to verify no apps are stressing out the SSD when running the test. Very odd behavior.
     

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  21. newellj macrumors 601

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    #21
    Check my speeds above. Those are with FV2.
     
  22. brotato macrumors newbie

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    Mar 11, 2010
    #22
    I am getting those speeds with FV2 on and off. I'll try reinstalling the OS and see if that helps.
     
  23. brotato macrumors newbie

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    Mar 11, 2010
    #23
    I seem to have fixed it by booting into the recovery partition, opening Disk Utility, first "Repair Disk" then "Repair Disk Permissions" on the partition itself. The Disk Repair resized the partition and repaired a couple other things and a few permissions were repaired in the library. Getting normal speeds now!
     

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  24. newellj macrumors 601

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    #24
    Glad it's resolved, too bad to have to go to the trouble. :-/ I solved the problem by preemptively reinstalling OS X via Internet Recovery after erasing the disk! :cool: Shouldn't have to do that but with nothing installed it really wasn't a big deal.
     
  25. Cvx5832 macrumors regular

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    Nov 2, 2014
    #25
    To those getting the low numbers, what happens when you leave it running for 3-5 minutes?

    I got the full speed even after FV2. Then this morning I thought I'd check after reading a thread here and sure enough I was posting only around 50 read/write. Then I noticed that if I left it running it would get faster and faster after each cycle, topping off at the screenshot below.

    I also noticed that each read/write cycle completes very fast. The Black Magic app transfers 5GB or times out at 8 sec whichever comes first. The fact I was seeing it cycle between read and write every 2 seconds tells me something is not right with the app itself.

    Bottom line, I think your machines are fine and not cause for concern.

    [​IMG]
     

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