1 Reply Latest reply: Sep 16, 2012 1:28 PM by BDAqua
David Yellen Level 1 Level 1 (110 points)

My iMac is acting very strangely: after a restart, an external drive (or more) may suddenly become "locked" for no apparent reason. Just restarted and got an error message that it could not complete a Time Machine backup because it is on a "locked Volume".

 

Running "repair" in Disc Utility fixes the issue, although it never reports any actual problem on the volume.

 

I have also started having kernel panics, which I think may be related.

 

Any idea what might be causing this?


iMac (24-inch Early 2009), OS X Mountain Lion (10.8.1)
  • BDAqua Level 10 Level 10 (119,355 points)

    Hello, see how many of these you can answer...

     

    See if the Disk is issuing any S.M.A.R.T errors in Disk Utility...

     

    http://support.apple.com/kb/PH7029

     

     

    Open Activity Monitor in Applications>Utilities, select All Processes & sort on CPU%, any indications there?

     

    How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.

     

    Open Console in Utilities & see if there are any clues or repeating messages when this happens.

     

    In the Memory tab, are there a lot of Pageouts?

    https://discussions.apple.com/servlet/JiveServlet/showImage/2-18666790-125104/AMPageouts.jpg