New MBP clunks when I move it

Discussion in 'MacBook Pro' started by ss957916, Aug 5, 2009.

  1. ss957916 macrumors 6502a

    Jun 17, 2009
    It makes a clunk sound as I move it. Harddrive maybe? Should I be concerned?
  2. Ivan P macrumors 68030

    Ivan P

    Jan 17, 2008
    It'll be the sudden motion sensor taking action. It detects that the computer is being moved so it parks the head on the hard drive as to stop any damage from occurring. It's protecting your computer :)
  3. stridemat Moderator


    Staff Member

    Apr 2, 2008
    Mac OS X parks the 'heads' of your HD as much as it can to protect the hard drive should the laptop suddenly move, and to conserve power. Unfortunately, it happens so much that it causes 2 problems:

    1) Each tick is known as a 'load cycle', and too many load cycles causes premature HD failure

    2) On some drives, the tick is loud enough to be highly annoying in a quiet room. But, Apple's hitachi drive didn't seem to be loud enough that I noticed it at all. I only noticed it when I put the WD drive in.

    Go to link

    Now, this stops the drive from EVER parking the heads, so you will never hear the ticking again

    BUT, it causes two more problems:

    1) The head parking does actually protect the drive from movement damage, so you are increasing the chance of failure

    2) It messes with the automatic sleep function which means you have to close the laptop to get it to sleep, or go to apple > sleep. As long as the laptop is left open, the hard drive will keep spinning and spinning forever!

    AND, you have to open terminal and type 'hdapm disk0 max' every time you reboot and sometimes when you switch to battery power.

    Taken from macrumors article link
  4. Lone Deranger macrumors 68000

    Lone Deranger

    Apr 23, 2006
    Tokyo, Japan
    If it really annoys/worries you, go and buy an Solid State Drive. :)
  5. drummerlondonw3 macrumors 6502a


    Feb 10, 2008
    maybe you are moving your laptop too suddenly, I rarely hear mine, other than starting up etc, being more gentle might help?

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