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Disk Drive ejecting itself

292288 Views 907 Replies Latest reply: Mar 27, 2014 7:57 AM by Pauleduc RSS
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judithnewman Level 1 Level 1 (0 points)
Currently Being Moderated
Sep 9, 2009 5:40 PM
My Time Machine disk drive has been "ejecting" itself since I installed Snow Leopard. I'm not unplugging it, or turning it off. I'm not touching it.
I'm getting the following error message:
"The disk was not ejected properly. If possible, always eject a disk before unplugging it or turning it off."

My question is why would a disk drive be "ejecting" itself. I've turned off the auto backups, and unselected the drive as the backup disk. It is still "ejecting" itself which leads me to believe the problem isn't with Time Machine but with something else - something connected with Snow Leopard because this wasn't happening five days ago before I installed SL.
iMac5,1 Intel Core 2 Duo, Mac OS X (10.6)
  • William Boyd, Jr. Level 6 Level 6 (10,475 points)
    Currently Being Moderated
    Sep 9, 2009 7:19 PM (in response to judithnewman)
    judithnewman wrote:
    My Time Machine disk drive has been "ejecting" itself since I installed Snow Leopard. I'm not unplugging it, or turning it off. I'm not touching it.
    I'm getting the following error message:
    "The disk was not ejected properly. If possible, always eject a disk before unplugging it or turning it off."

    My question is why would a disk drive be "ejecting" itself. I've turned off the auto backups, and unselected the drive as the backup disk. It is still "ejecting" itself which leads me to believe the problem isn't with Time Machine but with something else - something connected with Snow Leopard because this wasn't happening five days ago before I installed SL.


    Does your external drive have its own power source or does it receive its power over the data cable?
    MacBook 2.0 GHz, Mac OS X (10.5.8)
  • William Boyd, Jr. Level 6 Level 6 (10,475 points)
    Currently Being Moderated
    Sep 9, 2009 8:18 PM (in response to judithnewman)
    judithnewman wrote:
    Has its own power source.


    That eliminates the possibility that it's dismounting because of marginal power.
    MacBook 2.0 GHz, Mac OS X (10.5.8)
  • jimmykl Calculating status...
    Currently Being Moderated
    Sep 10, 2009 4:34 AM (in response to judithnewman)
    Ditto this.

    Ever since updating to 10.6 my two external USB drives have been spontaneously unmounting with the same error as above.

    I have tried every USB port, running repairs in disk utility, running Yasu to completely cleaning out all caches etc.

    I've never had any issues like this before with the drives or the iMac.

    Possibly also related is that it is 'hard' to sleep the machine now. Every time I choose to sleep it sleeps and wakens immediately with the drive disconnect warning.

    This never happened before the 10.6 update.

    Help! It feels uncomfortable not being able to complete a super duper image backup and it concerns me that my time machine backups could be compromised too.
    iMac 2GHz Core Duo, Mac OS X (10.6)
  • jimmykl Level 1 Level 1 (5 points)
    Currently Being Moderated
    Sep 10, 2009 4:36 AM (in response to judithnewman)
    Also as with Judith's situation my drives have independent power supplies.
    iMac 2GHz Core Duo, Mac OS X (10.6)
  • Glen Carpenter Calculating status...
    Currently Being Moderated
    Sep 10, 2009 5:42 AM (in response to jimmykl)
    Hi,

    My FW800 Seagate is doing the same thing, and it only "ejects itself" when I boot to 10.6

    The external HDD has its own PS.

    Backups are very important to me, so I'm going back to 10.5 on the desktop and won't be installing SL on my laptops until this gets fixed.
  • jimmykl Level 1 Level 1 (5 points)
    Currently Being Moderated
    Sep 10, 2009 3:45 PM (in response to judithnewman)
    It looks like this is an issue created by the energy saver preferences setting 'Put the hard disks to sleep whenever possible'. See this thread:

    http://discussions.apple.com/thread.jspa?messageID=10175769#10175769

    I changed this setting to 'on' and have not had any spontaneous unmounting issues since (two plus hours)

    During this time I've completed a time machine backup and super duper clone from one USB drive to another - this always caused the issue previously.
    iMac 2GHz Core Duo, Mac OS X (10.6)
  • Glen Carpenter Level 1 Level 1 (15 points)
    Currently Being Moderated
    Sep 12, 2009 4:43 PM (in response to judithnewman)
    Installed 10.6.1 on the iMac the moment it was released- No volumes have ejected themselves since.
    Computer has been running for the better part of 2 days, no shutdowns, reboots or sleeping, so I'm keeping my fingers crossed!
  • William Boyd, Jr. Level 6 Level 6 (10,475 points)
    Currently Being Moderated
    Sep 12, 2009 6:52 PM (in response to judithnewman)
    judithnewman wrote:
    Glen Carpenter wrote:
    Installed 10.6.1 on the iMac the moment it was released

    Glen, where did you get 10.6.1?


    http://support.apple.com/kb/DL930

    I went back to 10.5.8 - if I reinstall 10.6 will I have access to 10.6.1 via updates?


    Yes.
    MacBook 2.0 GHz, Mac OS X (10.5.8)
  • Glen Carpenter Level 1 Level 1 (15 points)
    Currently Being Moderated
    Sep 13, 2009 6:08 PM (in response to William Boyd, Jr.)
    Well, no fix.

    Logged in to report my external volume just ejected it self again.
    Seems to me this is happening when I quit applications- But that might just be my imagination.

    If I sleep the computer, the drive mounts itself successfully after waking and performs backups as expected, but I can't rely on this setup.
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