Insane Writes - Prevention

Discussion in 'OS X El Capitan (10.11)' started by hkbladelawkhk, Sep 29, 2016.

  1. hkbladelawkhk macrumors member

    May 25, 2010
    I've got a 1TB Samsung SSD in my iMac, installed about a year ago. Annoyingly enough It's now had an astonishing 17.1 TERABYTES written. Is it just me or does this seem really high? I know Crashplan is one culprit, and I just moved the cache to an external HDD. Looking at activity monitor, launchd is at the top now that I've cleared Crashplan. Any thoughts on chasing this down? A lot of the posts I've seen are older than a year, or irrelevant. Then again, I'm tired, that may not be helping :)
  2. keysofanxiety macrumors G3


    Nov 23, 2011
    Crumbs. How often do you shut down? Reopen windows when logging back in unticked/disabled?
  3. leman macrumors G3

    Oct 14, 2008
    If you keep up those rates then you will probably start seeing noticeable write endurance issues only after 20+ years. I am sure that your SSD and the computer will die long before that of unrelated issues. I wound't worry.
  4. hkbladelawkhk thread starter macrumors member

    May 25, 2010
    I barely shut down. Sleep mode more often. And I have sleep images, noatime, time machine local disabled.

    Yea. One can only hope. The fact that the ssd is impossible to get to on the imac, I'd rather not risk. It's writing more than it's reading.
  5. simonsi macrumors 601


    Jan 3, 2014
    My 1TB SSD has done 10TB in 18mths...obviously YMMV. It still has 100% wear indicator left according to DriveDX so I'm not too worried...
  6. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    Agreed... here is my two year old rMBP.

    OP> I would undo all those "tweaks" you did and just not worry about. That computer will be in the recycle bin before the SSD wears out.

    Screen Shot 2016-10-01 at 6.54.53 AM.png
  7. KALLT macrumors 601

    Sep 23, 2008
    launchd is the second process when booting and hierarchically above all other processes except kernel_task. I suspect that launchd is simply a catch-all for things that cannot be ascribed to other programs (anymore). launchd is at the top of my list too, with great distance.
  8. Fishrrman macrumors P6


    Feb 20, 2009
    OP wrote:
    "I barely shut down. Sleep mode more often"

    Then start shutting down at night, or during other periods of non-usage.

    The drive can't "write" when the power's turned off!
  9. hkbladelawkhk thread starter macrumors member

    May 25, 2010
    I put it in sleep mode at night because my computer is one of my alarms.

    Thanks everyone, makes me feel a little better!
  10. Zenithal macrumors G3

    Sep 10, 2009
    I've done 12.15 TB in 22 months on my latest SSD, my C drive. SSD Life Pro estimates I've got until 2023 to live with the drive at this rate, which hasn't changed since I first installed it. I can't say you have much to worry about. The biggest culprit of SSD writes is hibernate in Windows or Safe Sleep in OSX. It'll dump whatever is in the RAM to the OS drive and load it back into RAM when you come out of Safe Sleep. If OSX today is anything like Windows, a computer will come out of sleep now and again to test the network and download any data for apps that request the data.

    With SSDs getting cheaper by the week, it isn't a huge expense to get a new one before your current one dies out. Regardless, keep a backup of your contents.

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9 September 29, 2016