On an NTFS computer file system the master file table or MFT is an area of reserved disk space that records important information about files for the operating system. This area of disk expands as required when more files are added toa disk, and this can result in fragmentation of the MFT which can not be defragmented by disk utilities. A system which uses numerous disk files may benefit from having an MFT set to an intial larger size than the system default, and this can be achieved under the Windows XP operating system by issuing the command: 'fsutil behavior set mftzone 2' or replacing 2 with 3 or 4 for an even larger initial MFT. Before setting the MFT to a larger size, the disk needs to be cleared of files and defragmented, and then the files replaced. Research Master File Table