Like other operating system Mac operating system is also prone to corruption. Mac OSX corruption occurs due to various reasons like improper shutdown, application errors, hardware malfunctioning and many more. However, you can detect most of the corruption by using disk utility.
Let us consider in a practical scenario in which you try to mount a volume named as ‘volume 1’ containing important files in your MacBook. But, when you will try to mount it, you could not succeed in it. If you will run the ‘Disk Utility’ on this volume, you will get the following error messages:
Verifying volume “Volume1”
Checking Journaled HFS Plus volume
Checking Extents Overflow file
Invalid map node
Checking Catalog file
Invalid sibling link
Volume check failed
Error: Filesystem verify or repair failed
Disk utility fails to solve Mac Filesystem verify or repair failed error due to its limited functionalities. This error caused by Disk Utility shows that your MacBook volume is corrupted and it will create problems for you in accessing the files and folders present in the volume thereby causing severe data loss consequences. It has been found that ‘Disk Utility’ fails to repair the damaged Mac volume in several instances.
All such problems which you could not resolve by using ‘Disk Utility’ can be resolved by running fsck manually. In order to do that, boot your system in a single-user mode and at the time of booting; press ‘command’ and S keys down. Thenafter, type fsck -fy command. However, if these methods prove ineffective in resolving the Mac File system verify or repair failed error you can simply delete the existing volume and restore all your lost data with the help of an updated backup.
In the absence of a valid backup you can take the help of third-party Mac data recovery applications. Mac data Recovery software are the effective and easy-to-use applications which easily scan the entire corrupted Mac volume and also performs other recovery actions like iMac Data Recovery. It is a powerful application which recovers lost or inaccessible data from almost all operating systems like Mac OS X 10.6.x Snow Leopard, 10.5.x Leopard, 10.4.x Tiger and 10.3.9 Panther computers. It also supports HFS, HFSX, HFS+, HFS Wrapper file systems.
Processor: Intel Power PC (G4 or later)
Operating System: OS X 10.6 Snow Leopard, 10.5 Leopard, 10.4 Tiger, and 10.3.9 Panther
Memory: 256 MB
Hard Disk: 40Mb