Disk utility message "partition failed". What to do??

Discussion in 'macOS' started by Serpent12, Jul 23, 2011.

  1. Serpent12 macrumors newbie

    Jul 23, 2011

    I just downloaded Lion and was trying to make a seperate partition for it do I didnt delete Snow Leopard..
    WHen i was doing it, my computer froze for a while so i had to turn it off manually...

    Now when i try to create a partition i get this message..

    Partition failed with the error:

    Could not modify partition map because filesystem verification failed

    how can i fix this so i can install Lion on a partition??

    PS I dont have a external HD so i dont want to risk losing all my files...
  2. MacUser2525 macrumors 68000


    Mar 17, 2007
    Well you should not be attempting this without backup then.. That said boot your computer to single user mode (hold s key while booting) there it will tell you the commands to type in to check the file system and mount your / once done typing in reboot and hitting enter key will restart your machine halt shuts it down.

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