Logical corruption to the computer system is very common, even to the most reliable and stable operating system- Mac OS X. Damaged hard drive can not be accessed and you come across a number of error messages while trying to extract data from it. This behavior leads to critical data loss situations, if you do not have an updated backup in place. In such circumstances, you need Mac Disk Recovery to extract lost data from affected storage media.

When such situations occur, Mac operating system indicates you the problem in form of error message. One such error is as given below:

“Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid node structure
The volume Macintosh HD needs to be repaired.

Error: The underlying task reported failure on exit

1 HFS volume checked
Volume needs repair”

The above error message occurs when you run Disk Utility on the affected Mac hard drive. Such errors are generated by Disk Utility typically in case of root directory corruption. While performing the ‘Live Verification’, one process is performed by Disk Utility for verifying startup volume. If on-disk size for the truncated open-linked Mac files does not get modified before and if accidental system shutdown like issues remove such files, then this issue occurs.

How to fix this problem:

You can try out following things to perform Mac Disk Recovery by sorting out this issue:

Use fsck command line utility in single-user mode.

Boot up your system from the different volume prior to repair or verify.

If any of the above methods work, format the hard drive and reinstall Mac OS X operating system.

Formatting the hard drive and reinstalling the operating system is though a good process but it eventually leads to critical data loss. In order to retrieve lost data in such critical circumstances, Mac Disk Recovery Software are required.

These applications carry out in-depth scan of the affected Mac OS X storage media and extract all lost data from it. This Mac File Recovery Software come equipped with simple and interactive graphical user interface and thus do not demand sound technical skills. They do not alter original data on the hard drive as they have read-only and non-destructive conduct.

Stellar Phoenix Macintosh Data Recovery is the most effective and advanced tool for assured recovery in all Mac data loss situations. The software recover mac data from HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes. It is designed for Mac OS X 10.6, 10.5, 10.4, and 10.3.9.