Internal drive SIGNIFICANTLY slower than external for unknown reasons

Discussion in 'MacBook Pro' started by RadicalxEdward, Apr 1, 2013.

  1. RadicalxEdward, Apr 1, 2013
    Last edited: Apr 1, 2013

    RadicalxEdward macrumors 6502

    RadicalxEdward

    Joined:
    Mar 8, 2011
    #1
    Hello all,

    I am hoping that someone here has experienced this issue and can help.

    The Computer
    I am running a late 2011 model MacBook Pro
    OS X 10.8.3
    2.2 GHz i7
    8GM RAM
    1TB Internal SATA drive with several hundred GB free space

    The Issue
    For some reason the internal hard drive is running EXTREMELY slow. It can take up to 20 minutes or so to boot from power off to login screen and another 20-30 minutes to be functional at the desktop. Nearly every action thereafter is painfully slow.

    Attempted Resolutions
    I first went through the normal checks, how many apps are running, start up apps, active processes, memory used, etc. I had plenty of hard drive space, no background apps or services (under my control), 5ish GB of free memory, one app open, etc etc and yet still slow.

    I verified and repaired permissions (it did find a couple of errors), checked drive health (healthy), removed any unused applications, etc still slow.

    I decided I should give reinstalling os x a shot, did the upgrade version, no difference. Decided I should do a full wipe and clean install.

    I made a bootable backup to an external drive with Carbon Copy Cloner (very easy and useful app). I booted from the external drive expecting to just run the mountain lion installer from it, but the external drive boots and runs like the computer is brand new. Despite being an exact duplicate of my entire internal drive.

    Current Status
    The external drive runs perfectly, the internal drive is slow as hell despite the software side being exact duplicates. Does that mean the internal drive is dying or something even though disk utility says it's healthy?

    Do I need to replace the internal drive? or something else?


    Thank you to all of you who even read all this ;-) hopefully someone can help.

    UPDATE
    I have replaced the drive and reinstalled the os from scratch. The new drive, while being 500GB lighter, is functioning just fine. I put the old drive in an external enclosure and tried to boot from it. It takes forever just as before. So obviously it's the physical drive itself thats causing the problem at this point.

    Can anyone recommend a utility for the mac that can help me diagnose what would cause the old drive to appear healthy but run slowly? It's only a little over a year old.
     
  2. mrapplegate macrumors 68030

    Joined:
    Feb 26, 2011
    Location:
    Cincinnati, OH
    #2
    I don't know what is wrong, but the bottom line is no modern computer should take 20 min to boot and then another 20-30 min to get to the desktop.

    It does not take a genius , Apple or otherwise to tell you something is broken. If it is under warranty get it looked at, if not replace the internal hard drive.
     
  3. robvas macrumors 68020

    Joined:
    Mar 29, 2009
    Location:
    USA
    #3
    Open the console and watch for HD-related messages while you are using your machine.
     
  4. SuperMcGee macrumors newbie

    Joined:
    Apr 1, 2013
    #4
    I've heard that this can sometimes be due to a worn-out internal SATA cable. Try removing the HDD and running a SMART health check on it first before you replace it though.
     
  5. RadicalxEdward thread starter macrumors 6502

    RadicalxEdward

    Joined:
    Mar 8, 2011
    #5
    I had run a smart check before my post and it said the drive was ok.

    UPDATE
    I have replaced the drive and reinstalled the os from scratch. The new drive, while being 500GB lighter, is functioning just fine. I put the old drive in an external enclosure and tried to boot from it. It takes forever just as before. So obviously it's the physical drive itself thats causing the problem at this point.

    Can anyone recommend a utility for the mac that can help me diagnose what would cause the old drive to appear healthy but run slowly? It's only a little over a year old.
     
  6. Orlandoech macrumors 68040

    Orlandoech

    Joined:
    Jun 2, 2011
    Location:
    Salt Lake City, UT
    #6
    RMA the drive with the manufacturer.
     
  7. RadicalxEdward thread starter macrumors 6502

    RadicalxEdward

    Joined:
    Mar 8, 2011
    #7
    If I can I definitely will. I noticed when I swapped it out it's the only drive I've had go bad on me and the only non seagate drive I bought (its a samsung) coincidence? I think not. lol I'd rather not have to buy another drive though.
     

Share This Page