Results 1 to 6 of 6
  1. #1


    Member Since
    Jul 14, 2008
    Posts
    8
    External HDD Won't Unmount, Can't Access
    I'm running a MacBook1,1 with Tiger. I always shut it down at night, but the other night I left is hibernating and made a dumb mistake, I unplugged my external and the next morning opened the computer and it came out of hibernation with a warning saying a device was removed incorrectly. (obviously the external was still mounted.

    So now when I plug the drive in, my HFS+ partition automounts to the desktop (I also have a FAT32 partition that will does not automount anymore), but I can't access it, Finder locks up, need to relaunch. I open disk utility to try and fix the disk disk utility locks up have to force quit. Tried to access the partition via terminal, shows both partitions mounted, but terminal locks up when I CD to either partition. Tried to unmount via terminal (sudo diskutil unmount /Volumes/DriveName) and terminal locks up. Tried the same thing in the terminal on my recovery disk, same problem. Had to force quit terminal. Checked ownership and permissions, all are correct.

    The drive mounts, reads, and writes correctly on Ubuntu, but OS X is having some real issues. I can reformat if needed, but obviously the file system is ok, I'd like to fix whatever is wrong so OS X access it correctly again.

    Any thoughts?

  2. #2


    Member Since
    Jul 14, 2008
    Posts
    8
    ::bump::

    I'd really like to be able to recover this data, anyone have any ideas before I call it a bust and have to download 50GBs of iso's all over again?

  3. #3

    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,755
    FAT32 volumes have a high risk of getting corrupted if they aren't umounted properly. I'd wager that there's nothing wrong with your HFS+ volume... you just can't access it because the FInder is locked up trying to mount the FAT32 volume.

    You say Ubuntu mounts and reads the drive correctly... why not use Ubuntu to back up the partitions and then reformat them?

  4. #4


    Member Since
    Jul 14, 2008
    Posts
    8
    Quote Originally Posted by lifeisabeach View Post
    FAT32 volumes have a high risk of getting corrupted if they aren't umounted properly. I'd wager that there's nothing wrong with your HFS+ volume... you just can't access it because the FInder is locked up trying to mount the FAT32 volume.

    You say Ubuntu mounts and reads the drive correctly... why not use Ubuntu to back up the partitions and then reformat them?
    ok, so is there any way to prevent the drive from auto mounting? that way I can manual mount the HFS+ and back up before reformatting?

    I don't want to use ubuntu just because it's on an old P3 machine with 256mb of ram and it will take forever to transfer that much data. Tried it once, I have to do it essentially file by file or the system locks up.

    I can if I have to, just trying to avoid it.

    EDIT:
    What about this page? I know fstab.hd is empty in Tiger, can I really just create and fstab? Would OS X read it on boot, or just ignore the file? that would be excessively simple.

  5. #5

    Lifeisabeach's Avatar
    Member Since
    Sep 30, 2007
    Location
    The Republic of Neptune
    Posts
    7,755
    Quote Originally Posted by dgortze380 View Post
    ok, so is there any way to prevent the drive from auto mounting? that way I can manual mount the HFS+ and back up before reformatting?

    I don't want to use ubuntu just because it's on an old P3 machine with 256mb of ram and it will take forever to transfer that much data. Tried it once, I have to do it essentially file by file or the system locks up.

    I can if I have to, just trying to avoid it.

    EDIT:
    What about this page? I know fstab.hd is empty in Tiger, can I really just create and fstab? Would OS X read it on boot, or just ignore the file? that would be excessively simple.
    I didn't see the page that you presumably meant to link to, but here's a hint from MacOSXHints that demonstrates how to use fstab to stop a volume from mounting. I've not used it myself, but sounds like it's worth trying.
    http://www.macosxhints.com/article.p...60930150059172

  6. #6


    Member Since
    Jul 14, 2008
    Posts
    8
    Quote Originally Posted by lifeisabeach View Post
    I didn't see the page that you presumably meant to link to, but here's a hint from MacOSXHints that demonstrates how to use fstab to stop a volume from mounting. I've not used it myself, but sounds like it's worth trying.
    http://www.macosxhints.com/article.p...60930150059172
    sorry, that is the page I meant to link to. for anyone wondering I was NOT able to get fstab or fstab.hd to work in 10.4 Tiger.

    I don't know why I didn't think of this sooner but my solution is as follows.

    Boot Ubuntu.
    Back-up FAT32 partition to HFS+ partition.
    Use dd command to write zeros to FAT32 Partition. (dd if=/dev/zero of=/dev/sdb2)
    Reboot to OS X, FAT32 still won't mount or unmount but I now have access to my HFS+
    Backup HFS+ to MacBook HDD
    Reformat and never again use a FAT32 partition.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Cannot unmount my HDD
    By bluemoon222 in forum OS X - Operating System
    Replies: 5
    Last Post: 01-19-2012, 08:43 AM
  2. macbook pro wireless access to NTFS external HDD
    By dcjig in forum Internet, Networking, and Wireless
    Replies: 1
    Last Post: 04-15-2011, 06:42 PM
  3. Need Access Laptop HDD as External
    By Arielluria in forum Switcher Hangout
    Replies: 4
    Last Post: 08-27-2009, 12:18 PM
  4. External HDD Restricted Access
    By JohnTheMacGeek in forum Other Hardware and Peripherals
    Replies: 3
    Last Post: 03-08-2009, 08:57 AM
  5. External HDD Will Not Unmount
    By zoobum in forum Apple Notebooks
    Replies: 1
    Last Post: 07-26-2008, 05:27 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •