subject: Mac Recovery To Handle Allocation File Corruption In Hfs+ File System [print this page] HFS+ or Mac OS X Extended is a most widely used and reliable operating system, developed by Apple Inc. for its Mac OS X, series of operating systems. It is the enhanced version of HFS file system and supports larger file names, long length block addresses (32-bit), and Unicode support for naming files and folders. The file system is made up of a number of data structures and all these data structures need to be intact for proper working of your system. In case any damage to any of the data structures, you might come across serious data loss situations and need Mac Data Recovery to be handled.
Among all the HFS+ file system data structures, Allocation File is the most critical one. The Allocation File is responsible to record the allocation block details such as either they are free or in use. There are various sectors that combine to create HFS+ file system volumes and then allocation block, group of one or more than one sectors, is created. The number of allocation blocks could different as per size of the HFS Plus volume.
To create identifiable allocation block availability, all of them are represented by the bits that are all constituted into the Allocation File Table. If allocation block bit contains zero value, which means block is free or else it is used and you can not store data on it.
In some situations, this is compared to the Volume Bitmap of the HFS file system as it perform similar functions that Volume Bitmap performs for HFS file system volumes. But in fact they are different. The Allocation File isn't stored in beginning of Mac OS X volume on the reserved space. Instead it is stored as a regular file.
As illustrated above, the Allocation File is one of the significant files of HFS+ file system and any damage to this file may cause file system corruption. File System Corruption cause quite serious problems of data loss and need Data Recovery Mac to be handled.
Mac Data Recovery is best possible through third-party Mac Recovery Software. The applications use extensive scanning techniques to perform absolute recovery of all your lost data. With interactive and simple graphical user interface, the software are completely easy to use and thus do not demand sound and prior technical skills.
Stellar Phoenix Macintosh Data Recovery is a powerful and read-only product to ensure complete and quick recovery. It recovers data from all HFS, HFS+, HFSX and HFS Wrapper file system volumes. The software work well with Mac OS X 10.6, 10.5, 10.4 and 10.3.9.
