3 Replies Latest reply: Sep 19, 2011 8:47 AM by The hatter
stevelockridge Level 1 Level 1 (0 points)

I am using Bootcamp, Parallels 6, OS X Snow Leopard and Windows 7.  I boot directly to my Mac and only open Parallels/Windows 7 when necessary.


The problem is OS X is mounting my 1TB external drive that I use for Windows 7.  It is formatted as NTFS.  If I don't manually eject that drive before I shut down OS X, I get a shut down error.  I believe it is called the 'kernel panic' error.  I have to hold the power button down to shut the computer off.


Is there a solution to this?  I don't need OS X to mount that drive.  Can I prevent that from happening?

iMac 21.5" 3.2GHz Intel Core i3, Mac OS X (10.6.6)
  • 1. Re: NTFS drive causing shutdown error
    The hatter Level 9 Level 9 (58,880 points)

    The driver you are using in Mac OS.


    The drive enclosure itself.


    The best NTFS for Mac OS X is probably from Paragon and mounts more PC format external and internal drives safely and properly.


    Maybe you should ask Parallels. Could you be leaving the VM in suspend state and not shutdown properly itself?

  • 2. Re: NTFS drive causing shutdown error
    stevelockridge Level 1 Level 1 (0 points)

    Hatter, the drive is a Western Digital Elements USB 2.0 1TB drive.  I have three of them.  Only this one is formatted NTFS.


    Before I installed Parallels, a friend loaned me his external HD to copy some files.  It was formatted NTFS.  I had the same shutdown problem with that drive.


    The NTFS drive is mounting at OS X startup.  Sometimes I don't run Parallels.  That's when I get the error.  If I run Parallels, it removes the icon from the Mac desktop (I assume it is unmounting it) and it shows up in Windows 7.


    I don't believe the problem is Parallels.  There has to be a way to tell OS X not to mount that drive.  I found some commands but they aren't working in OS X 10.6.6.  I can manually eject the drive before shutting down but it's just an extra step and sometimes I forget.

  • 3. Re: NTFS drive causing shutdown error
    The hatter Level 9 Level 9 (58,880 points)

    I am not a fan of WD Passport, Elements or half their MyBook.


    Paragon has the fastest I/O and stable copying as well as I mentioned bettere IOKIt for mounting those drives. They also make an HFS+ driver for Windows and LInux.


    Parallels may load its own NTFS driver of course.