![]() Defragging a hard drive populates the related files together as much as possible and speeds up the system performance. Defragmentation is the method to lower the fragments and make the unused space available as contiguous storage. Fragmentation was often caused by continually appending data to existing files, especially with resource forks. This allows a number of small allocations to be combined into a single large allocation in one area of the disk. ![]() It may also lead to system crash or boot time problems. Mac OS X 10.2 and later includes delayed allocation for Mac OS X Extended-formatted volumes. They remain useless in the form of isolated memory space. ![]() ![]() Now, if a file requires 23 bytes of storage, it has to be allocated 32 bytes. The memory chunks can be provided in the multiples of 4, 8 and 16. The most difficult to remove fragmentation type is internal fragmentation which occurs due to the rules according to which the space on the storage is allocated to the data. The files are written to the storage in chunks of memory and upon repeated write and read operations they leave memory chunks that cannot be used as contiguous storage locations. In simple words, defragging Mac hard drive moves everything in order and fills the holes which exist while using the files. It erases the gaps from the files and stores them as a single whole part in the same location. Fragmentation is a common phenomenon that occurs on the hard drives over the course of time and its usage. Defragment is the process where scattered files from the storage are organized.
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