Turning off the internal hard drive

Discussion in 'MacBook Pro' started by efedor, Apr 10, 2009.

  1. efedor macrumors regular

    Nov 18, 2007
    I have a 64gb ssd drive that I use to boot up my macbook pro 15(classic) and a 320 gb on my optibay. I would like to know if there is such a program like smc fan control but for internal hard drives in order to turn off or "PARK" the 320gb hd, This would help increase my battery live as well as making it more quiet. Thanks
  2. alphaod macrumors Core


    Feb 9, 2008
  3. efedor thread starter macrumors regular

    Nov 18, 2007
    Yes I can unmount it but how do I access it when I need it. I know that on an external drive I can just unmount it it and turn it off(switch) and when I need it I just flip the switch on the external and Im good but I'm confused on how I can do that with the internal drive.
  4. m85476585 macrumors 65816

    Feb 26, 2008
    There should be a way to do it in terminal using the diskutil command.

    Does it still show up in Disk Utility after it has been unmounted? If so, that might be able to mount it as well.
  5. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    After 10 minutes of idle, the drive shuts down itself.
  6. shoulin333 macrumors 6502a

    Jun 26, 2007
    You can un-mount and mount it in Disk Utility
  7. efedor thread starter macrumors regular

    Nov 18, 2007
    Thanks for the advice, I am able to unmount it and mount it back on using disk utility. Only problem is... it still spinning!!! and I want it to stop so it doesn't use up the battery, I don't want it on for 10 minutes for it to shut down, I only want to activate it when I need to store large files.
  8. haircrime macrumors newbie

    Oct 19, 2008
    Hello all,

    I have the same problem. Using an SSD as main drive and a 2nd Harddrive with optibay in my unibody macbook.

    Even if I unmount the drive with different methods, it always starts spinning again after a couple of minutes. Does anyone know how to completely shut off the 2nd internal drive?

    Thank you very much.
  9. haircrime macrumors newbie

    Oct 19, 2008
    no help?


    It must be possible to stop the second internal harddrive from spinning somehow.
  10. m85476585 macrumors 65816

    Feb 26, 2008
    You could install a switch that physically disconnects the power after you unmount it.
  11. fehhkk macrumors 6502a


    Jun 11, 2009
    Chicago, IL
    Enable the "put the hard drives to sleep when possible" option in Preferences -> Energy Saver, and the drives will spin-off during inactivity. Works for me.
  12. njl macrumors regular

    Mar 15, 2009
  13. Sensamic macrumors 68030

    Mar 26, 2010
    Imac 27


    Im very interested in this option too. If I unmount the internal hard drive of my imac 27 will it stop completely and stop spinning and therefore be completely quiet?

    I did a test with the Mac OS X dvd. I restarted using the dvd and wen to disk utility, where I unmounted the internal hard drive. However, it continued to make noise every 30 seconds or so. I could hear the hard drive spinning.

    Then, I enabled the "put the disk to sleep when possible" and tried again. The hard drive seemed to stop completely and I couldnt hear anything, so I was very glad. Is this test viable? Would it be the same If I bought an external hard drive or SSD and unmount the internal hard drive of the imac? I mean, would it stop completely or would it turn on automatically every now and then?

  14. xexets macrumors newbie

    Oct 22, 2009
    sorry to pick up on an old thread but I am having similar concerns.
    i.e. I have an SSD in my optibay, which is set to be the boot drive and a momentus xt in my primary hard drive bay. When I unmount it it spins down, but then after a while it spins up again (although it does not mount). I have turned off spotlight indexing for the drive and uninstalled istat widget, which as far as I understood could wake up a drive.
    It still spins up randomly...
    Is there some software that could tell me what is accessing that drive? Neither activity monitor nor console seem to be very telling for this.
    Also, strange thing... using the developer software SPINDOWNHD even when my xt in unmounted and parked it looks like ACTIVE. I never managed to make it inactive or sleeping.
    Any clues?
  15. aikinai macrumors newbie

    Dec 26, 2010

    If you're still wondering how to do this, you have to eject the disk, not just unmount it. Charlie.naylor posted a perfect script for ejecting the drive. Just change "Backup" to the name of the drive you want to eject.
  16. mulo macrumors 68020


    Aug 22, 2010
    Behind you
    if you have xcode installed, it contains an app called SpindownHD that lets you configure sleep timers for devices attached to your sata controller.
  17. millerb7 macrumors 6502a

    Jun 9, 2010
    Why not just change the spindown from 10 min (default) to 1 min?

    That way after 1 min of inactivity it'll spin down?

    Sudo pmset -a disksleep 1
  18. jborko macrumors member

    Jan 17, 2011
    This is excellent solution! I was wondering if you can decrease the spindown time to 30 sek.?
  19. Fishrrman macrumors G5


    Feb 20, 2009
    [[ Yes I can unmount it but how do I access it when I need it. ]]

    Use the free app called "Semulov".

    Old thread, but perhaps this may help someone...

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