Invalid block count and poor performance

Discussion in 'OS X Mountain Lion (10.8)' started by Joellypops, May 29, 2013.

  1. Joellypops macrumors newbie

    Dec 21, 2012
    Hi - Can anyone help?

    Running an early 2011 13' MBP on ML. For a year - 18 months I've noticed poor performance at times, consistently slow boot (sometimes 5 minutes to usable), occasional lockups and spotlight often reindexes itself and slows the system (much more than my previous MBP), I can't see anything that triggers it. I'm also getting recurring errors in Disk Utility of 'Invalid block count', every time I'll repair the disk, but after a month of use the error will reappear. About three months ago I erased and reinstalled ML, some of my data was moved over in Time Machine but I didn't restore from it. The erase and reinstall hasn't made any difference and I'm still seeing the same issues. Hard disk SMART status appears to be fine.

    Can anyone recommend any troubleshooting steps? I'm not sure what else to do, still under Applecare and was thinking maybe the HD isn't working correctly?

    Cheers! :)
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    Do a command-r boot to recovery and run Disk Util repair from there and see if that fixes the disk errors. If the disk errors reappear after that it would point to a bad drive.
  3. old-wiz macrumors G3

    Mar 26, 2008
    West Suburban Boston Ma
    the SMART status doesn't always show that a drive is going bad. Smart thing to do is let Apple take a look at since you have Applecare.

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