Mac OS X operating system uses permissions/preferences, which group and user can modify or access stored files. It enables this powerful operating system to work like a multi-user operating system, for maintaining clear detachment between the files owned by various users. This detachment offers security and confidentiality. System stability and reliability is also ensured by this method, as only the administrator can delete or modify your system files. However, in some cases, the permissions get damaged and you can not access the data stored in your account. This behavior leads to critical data loss situations and requires Mac recovery to be fixed.
The hard drive permissions may become faulty from time to time. It happens usually after software installation. The file and directories, whose permissions are damaged, become inaccessible and you may lose your valuable data in such cases. Because the damaged permissions may affect the reliability and security of your system, you are recommended to repair disk permissions after installing a new software...
Hard drive inconsistency and integrity problems are very common in Mac OS X operating system. To handle such problems up to an extent, Mac OS X operating system provides you an inbuilt tool, called Disk Utility. It verifies your hard drive and repairs the damages in some situations. The utility can be run from boot disk of Mac OS X operating system. You can run this program even on the live hard drive. This process is known as Live Verification. However, in some situations, Live Verification of Mac hard drive may cause serious problems that lead to hard drive failure and data loss. At this point of time, you need to go for Mac recovery solutions, if there is no valid backup in place.
You should keep the below things in mind while performing a Live Verification of Mac OS X had drive:
The Live Verification works only on Journaled volumes of HFS+ file system. If you try it on non-journaled volumes, you may get an error message stating: “ERROR: could not freeze volume (Operation not supported).”...
A Mac OS X volume can get corrupted for multitude of reasons. The first attempt of repairing a corrupted Mac OS X volume should always be to run 'Disk Utility'. But if this fails, you should try other
Mac Disk Recovery solutions such as, running fsck or reinstalling the operating system.
For more clarification, consider the worst scenario when you cannot boot your Mac OS X computer. Neither the normal boot nor the safe mode work and consequently, Mac is completely inaccessible. Thus, you try to fix the problem using 'Disk Utility' from Mac OS X install disc. But to your surprise, the tool doesn't work as expected. An error report is generated and you see errors similar to the ones specified below:
Error Message: Invalid file count (It should be x instead of x+1) AND
Error Message: Invalid volume directory count (It should be x instead of x-1)
Where, 'x' must be replaced by the expected count value.
Cause...
