Data loss in Mac due to Allocation File Corruption
The Mac OS X now makes use of the HFS+ file system, as compared to the HFS file system that was formerly being used in Mac computers. The reason for HFS+ or HFS extended being used is because; it has much more advanced features than the former. HFS+ lets you manage data in a better way, and let you store large amounts of data compared to HFS file system.
This efficient working of the HFS+ file system is made possible, by the various data structures that it makes use of. One of the main data structures it makes use of, is the Allocation file, which is responsible for recording the allocation block details. The number of allocation blocks varies depending on the size of your HFS+ volume. The Allocation block is very much similar to Volume Bitmap of HFS file system.
Since the Allocation file plays a vital role in the proper functioning of the HFS+ file system, its corruption, could lead to serious data loss situation. The Allocation file usually gets corrupted, due to power surge, virus attack etc. You would require a good Macintosh data recovery software, to retrieve the data from such a complex data loss scenario. Mac Recovery software is an expert Mac data recovery tool, which lets you recover data from both HFS+ and HFSX volumes, and recover Mac partitions with ease.