Permission Refused to read my external hard drive

Posted on 2008-11-03
Last Modified: 2012-05-05
I can't access my WD external hard drive anymore (firewire).
I have an Imac with leopard.
Two weeks ago, my system wouldn't boot anymore. Nothing worked of the classical solutions (safe mode, etc...), so i decided do restore the system from Leopard CD. It created a user called 'previous system' and kept all my datas. The only problem is that now when i try to acces my hard drive, it says that i don't have the permissions to do so (the drive appears on the desktop with a little lock).
 When I try to change the permissions, it doesn't let me do so, even though i have the administrator's rights (unelss i mistake). Safe Mode doesn't help...The otpion 'repair permissions' isnt available in the disk utilities.. I am clueless!! Thanks for your help
Question by:rotemweb
    LVL 53

    Accepted Solution

    There is a discussion of the problem with a propose solution here:

    Author Comment

    Excellent! This post completely solved my problem. I couldn't find it myself.

    For info: (in case the link becomes broken)  I executed this command in the terminal:

    ls -alO /Volumes     # Use this command for Leopard   <--- or delete this line or comment
    ls -alo /Volumes    # Use this command for Tiger or previous   <--- or delete this line or comment
    diskutil list
    echo "done"

    The line concerning my volume showed:

    drw-rw-r-T+ 18 agentggd  staff  uchg    680 May 28 08:56 rotemdrive ext

    The "uchg" means that the user immutable flag is set
    To undo this, I typed:  (don't forget to esape a space in the volume name with \)

    chflags nouchg /Volumes/rotemdrive\ ext
    sudo chmod 1775 /Volumes/rotemdrive\ ext
    echo "done"
    It asks for the password (doesn't work with password set to nothing -->must create a password)

    And then you can change the permissions in the Volume Infos

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