Permission denied message when mounting external drive in single user mode

Discussion in 'macOS' started by garsidenrg, May 4, 2010.

  1. garsidenrg macrumors newbie

    May 4, 2010

    One day, my MacBook Air wouldn't boot up. After booting from the Install DVD and running disk utility, it said that there was a problem with the internal hard disk drive and that it needed to be reformatted and OS X reinstalled. :mad:

    I am now trying to backup some of my files onto a 1TB external hard disk drive using single user mode.

    I have created the directory with the following command...
    mkdir /Volumes/lacie

    ...and are trying to mount the drive with the following command...
    /sbin/mount_hfs /dev/disk1s1 /Volumes/lacie

    ...however, it comes back with this message when I press return:
    mount_hfs: Permission denied

    Please can somebody help. :confused:
    Nigel Garside.
  2. mx12 macrumors newbie

    Oct 25, 2008

    Try putting sudo before you command:

    sudo /sbin/mount_hfs /dev/disk1s1 /Volumes/lacie

    This makes the command execute as a super user.
  3. garsidenrg thread starter macrumors newbie

    May 4, 2010
    still no

    No. Sorry. Doesn't work. Same message.

    Thanks for trying.
  4. tiiv macrumors newbie

    May 6, 2010
    Wrong disk name probably? Isn't it something like /dev/rdisk1s1 or the like? What devices do you have in /dev that has "disk" in its name?

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