Archived - Disk Utility reports "Underlying task reported failure" when repairing a volume

This article has been archived and is no longer updated by Apple.

Symptoms

In rare circumstances, Disk Utility may display the following message when you try to verify or repair a disk:

"The underlying task reported failure"

The Disk Utility log will also display a -9972 error code. This indicates that your disk volume has issues that Disk Utility cannot fix.

Resolution

What can I do?

If you experience this rare occurrence, you should attempt to resolve the issue as soon as possible.

  • Try using fsck in single user mode, or start up your computer from a different volume before verifying or repairing.
  • Back up as much of your important data and files as you can, then try using a third-party disk utility to repair the drive. Be sure that you use one that works with your version of Mac OS X.

  • Back up as much of your important data and files as you can, then perform an Erase and Install installation of Mac OS X on the affected volume.
    Important: This option completely erases the destination volume and then installs a new copy of Mac OS X. You should always backup important files on the target volume before performing an Erase and Install installation. You can then restore your backed up files afterwards.

For Mac OS X 10.4.6 or earlier: If you have Adobe Photoshop CS2 or Adobe Illustrator CS2 installed, try removing the following files:

  • /Applications/Adobe Photoshop CS2/Legal.localized/Tiê�?ng Việt.html
  • /Applications/Adobe Illustrator CS2/Legal.localized/Tiê�?ng Việt.html

If you wish to view these documents please visit this website.

Important: Mention of third-party websites and products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Apple assumes no responsibility with regard to the selection, performance or use of information or products found at third-party websites. Apple provides this only as a convenience to our users. Apple has not tested the information found on these sites and makes no representations regarding its accuracy or reliability. There are risks inherent in the use of any information or products found on the Internet, and Apple assumes no responsibility in this regard. Please understand that a third-party site is independent from Apple and that Apple has no control over the content on that website. Please contact the vendor for additional information.
Last Modified: Dec 13, 2011
Helpful?
Yes
No
Not helpful Somewhat helpful Helpful Very helpful Solved my problem
Print this page
  • Last Modified: Dec 13, 2011
  • Article: TS1901
  • Views:

    142667
  • Rating:
    • 58.0

    (596 Responses)
Start a Discussion
in Apple Support Communities
See all questions on this article See all questions I have asked