Volume Header Corruption Causes Data Loss In Mac Os X
Mac OS X operating system enables you to divide your hard drive into several partitions
, called volumes. Every Mac volume is formatted using a file system, which can be HFS, HFS+, HFSX, or HFS Wrapper. The information related to Mac volume, such as volume size, file system type, starting sector address, and more, is stored in volume header. In case the volume header gets damaged, entire volume becomes inaccessible and you face severe data loss situations. At this point, Mac file recovery becomes need of hour, if there is no updated backup in place.
Mac OS X operating system provides an inbuilt utility, called Disk Utility, to fix most of the errors on Mac hard drive volume. It checks consistency and integrity of the file system and hard drive. However, in some situations, when you try to fix a damaged volume using the Disk Utility, the below error message occurs:
Volume Header needs minor repair
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1HFS volume checked
Volume needs repair
After the above error message, disk verification process gets interrupted. The volume remains corrupt and inaccessible after this behavior. In order to retrieve lost data from Mac hard drive volume, you need to find out the cause of this problem and perform data recovery Mac by resolving it.
Root of the problem:
As stated in the above error message, this behavior of Mac OS X hard drive occurs due to corruption to the volume header. After volume header corruption, Mac OS X operating system can not recognize the volume and thus it can not be accessed.
Volume Header is 1 KB file system metadata structure in Mac. This is parallel to Master Directory Block for HFS file system. It stores significant information about volume, such as physical locations and data structures.
Solution
To fix this behavior of your Mac machine, you need to format the hard drive, recreate the hard drive volumes, reinstall operating system, and then restore data from backup. If backup is not available then
Mac data recovery is performed , using third-party applications.
The
Mac file recovery softwares are powerful enough to carry out in-depth scan of entire hard drive and extract all lost data from it. They have simple graphical user interface to ensure easy recovery.
Stellar Phoenix Macintosh Data Recovery is the best data recovery software ever made to retrieve lost Mac data. It is usable with Mac OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther. The software supports recovery from HFS, HFS+, HFSX, HFS Wrapper, and FAT file system volumes.
by: Allen Sood
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