External drive locked as read only

Discussion in 'Mac Accessories' started by elbikay, Apr 3, 2012.

  1. elbikay macrumors newbie

    Joined:
    Mar 31, 2012
    #1
    I've read several threads here about fixing permissions to unlock a drive that has become locked as readonly. I have tried running the suggested commands in terminal to no avail.

    This is an external drive, worked fine before, never hooked to a pc - mac only all its life.

    Now, get info shows that it is Read Only. The lock icon is not clickable.

    Looking at permissions in terminal the world bit has a "t" rather than an "x" and it also has a "@":

    Code:
    drwxrwxr-t@ 36 Jake  staff  1292 Aug 13  2011 backup box
    when I try running the various permission changing commands I've found in different threads on this forum, no change is made and the feedback lets me know the disk is readonly. eg:

    Code:
    chmod: backup box/: Read-only file system
    TRIED:
    Code:
    sudo chflags 0 backup\ box/
    chflags: backup box/: Read-only file system
    
    mac-mini:Volumes Jake$ sudo chown 0:80 backup\ box/
    chown: backup box/: Read-only file system
    mac-mini:Volumes Jake$ sudo chmod 775 backup\ box/
    
    chmod: backup box/: Read-only file system
    mac-mini:Volumes Jake$ sudo chmod -N backup\ box/
    chmod: Failed to clear ACL on file backup box/: Read-only file system
    mac-mini:Volumes Jake$ chflags -R nouchg backup\ box/
    chflags: backup box//.DS_Store: Read-only file system
    
    Tried running disk utility - repair permissions option greyed out. Tried verifying the disk. Got this error:

    Code:
    Invalid key length
    Volume check failed.
    
    Error: Filesystem verify or repair failed.
    And now I can't access the disk at all.

    I would appreciate any help.

    Thank you so much.
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    How is the drive formatted?
     
  3. elbikay thread starter macrumors newbie

    Joined:
    Mar 31, 2012
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Some have suggested DiskWarrior for such problems. I haven't tried it, but it's worth a shot.
     

Share This Page