Overlapped extent allocation Error in Mac

Your computer hard drive may encounter problems at any point of time irrespective of the operating system and hardware resources you are using. Most of the operating systems provide inbuilt disk repair tools to overcome such problems. For example, Mac includes Disk Utility and fsck to fix these issues.

These tools work in most of the situations of hard drive errors as they can easily find the errors and can even fix the minor problems. Though at times these tools may report the following error while performing disk checkup:

"Overlapped extent allocation."

This error message occurs when these tools can not resolve this problem.

Overlapped Extent Allocation error occurs when two Mac files occupy same memory space on the hard drive. Although, this situation does not occur so often but it results as loss of precious data. In case of such errors, you should not install any software on your hard drive to avoid overwriting the drive.

In such situations, for successful completion of the disk check process, you need to resolve this problem as quickly as possible.

Solution

To resolve this problem, backup all your data and then boot you Mac system using the installation DVD and perform a clean reinstall using ´Erase and Install´ option. It will resolve all your disk related errors caused due to logical corruption.

If it is not an ideal solution for you due to reasons like time or effort, you can delete the particular file causing the above error and restart the disk checking process.

Though, these methods can resolve the issues of overlapped extent allocation but can not recover the lost data. To get your data back, you need to go for Mac Data Recovery.

Mac Data Recovery is carried out using third party applications known as Mac Recovery software. These tools are capable of systematically scanning the whole hard drive and achieve perfect and safe Data Recovery Mac.

Stellar Phoenix Macintosh Data Recovery is the most comprehensive and easy to use Mac Recovery software that recovers your valuable files under all data loss situations. It supports Mac Recovery from HFS, HFS+, HFSX, HFS Wrapper and FAT file system volumes. It is compatible with Mac hard drives (SATA/ IDE), USB flash drives and external hard drives, Firewire hard drives and memory cards. Phoenix Mac Data Recovery software is compatible with Mac OS X 10.5 Leopard, 10.4 Tiger and 10.3.9 Panther. It even recovers data from the world leader personal media player Apple iPod at no extra cost.