Due to the possibility that a file can occupy more than one cluster, a rapid and large disk fragmentation occurs. The size of the clusters is determined by the size of the partitions that much space is wasted in large capacity hard drives. Cluster sizes for FAT16 and FAT32: size the partition size cluster FAT16 128 KB 256 MB 2 MB 4 KB 512 MB 8 KB 1 GB 16 KB 2 GB 32 KB 8 GB Not supported 16 GB Not supported 32 GB Not supported size of the partition size cluster FAT32 32 GB 32 KB in FAT file name is limited to 8 + 3 characters, it was not until the appearance of Windows 95 with its extended FAT file system (V-FAT) that disappeared this limitation. FAT32 is an enhanced version that allows you to create partitions larger than 2 GB (up to 2 terabytes) and is more efficient in storing files. Since FAT32 uses cluster more small than FAT16, FAT32 partition equal size better leverages the hard disk space.

HPFS HPFS or high performance file systems are found mainly in computers type OS/2 even though its original development was done by Microsoft. This file system is much more secure, stable and reliable than the FAT. They have access to the data on the disk hard through a buffer of high-speed (cache), and it is capable of supporting multiple active partitions at the same time. HPFS filenames can contain up to 254 characters in length. UNIX file systems the UNIX file system is totally different from those that they are seeing, only it is possible to access data UNIX with other UNIX file systems or special additional programs (NFS-Server) or network file system server. These systems have no limitation on the length of the names of files, not the hard disk divided into blocks such as the FAT system and are very stable.

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