SSD R/W Slow Down

Discussion in 'iMac' started by starscript, May 4, 2013.

  1. starscript macrumors member

    Dec 21, 2012
    Glasgow, Scotland
    Hey Every One,

    I got my new iMac 2012 in December and put in a Samsung 830 256Gb SSD in it very soon after getting it.

    Recently I have noticed that things have been slowing down. So I ran Blackmagic speed test and I have decreased from just under 500Mbs transfer rate to around 200Mbs.

    I have Enabled Trim Support etc.

    Can any one explain whats happened to my transfer rate and how i can get it back?


    Attached Files:

  2. Nuke61 macrumors 6502

    Jan 18, 2013
    Columbia, SC
    How full is your drive? Verify again that TRIM is enabled, set sleep to never, and let it sit idle overnight.
  3. starscript thread starter macrumors member

    Dec 21, 2012
    Glasgow, Scotland
    Thanks, I did go and investigate Trim support.
    Turns out it got turned off,
    I suspect this happened when I took my iMac to get a repair.

    I tured Trim on, restarted poped to the shops back up to 500Mbs :)

    Thanks for your response
  4. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    It usually gets turned off with each OS X point update because the tweaked kext files are overwritten, so it probably got turned off when you updated to 10.8.3.

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