disk utility

Discussion in 'macOS' started by hickory, Feb 23, 2009.

  1. hickory macrumors newbie

    Feb 16, 2009
    doing some disk utility stuff turned this up... but I cannot select repair disk.

    Verifying volume “Macintosh HD”
    Checking HFS Plus volume.
    Checking Extents Overflow file.
    Checking Catalog file.
    Checking multi-linked files.
    Checking Catalog hierarchy.
    nded Attributes file.",0)
    Checking volume bitmap.
    Volume Bit Map needs minor repair
    Checking volume information.
    Invalid volume free block count
    (It should be 12041024 instead of 12041020)
    The volume Macintosh HD needs to be repaired.

    Error: The underlying task reported failure on exit

    1 HFS volume checked
    Volume needs repair
  2. neonblue2 macrumors 6502a

    Aug 25, 2006
    Port Pirie, South Australia
    Boot from your install disc (hold "C"), select Disk Utility from the menu and click on "Repair Disk".
  3. telecomm macrumors 65816


    Nov 30, 2003
    You can't select Repair Disk because you can't repair the disk which contains the active OS.

    Aside from booting from the install disk and running disk utility from there (probably the easiest route to take), if you're feeling a bit more adventurous (or don't have your install disk handy), you can do exactly the same repair by holding Command (Apple key) + S on startup (i.e., immediately after the chime) to boot into Single User Mode. (Basically you'll get something that looks like a DOS prompt when it's done, it's a terminal command line interface).

    Then you can type

    fsck -fy

    (which stands for File System ChecK), wait for it to finish (you'll notice it gives the same lines of feedback as those you'd see in Disk Utility, since all Disk Utility is really doing is running this behind the scenes).

    Once it's finished you could run it again just to verify that everything has worked as planned, then type


    and you'll reboot as usual into the normal OS.
  4. hickory thread starter macrumors newbie

    Feb 16, 2009

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