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MFT
Last modified: Tuesday, January 13, 2004
Short for Master File Table, a file that contains information in the form of 1024-byterecords about every other file and directory in an NTFSvolume (i.e., it is essentially a table of metadata). The data stored in the MFT is what the operating system needs to retrieve the files. For example, it contains file permissions, the name and size of the file, the date and time it was created and the date and time it was modified.
NTFS reserves the first 16 records in the MFT for special metadata files, listed below:
Record 0: metadata about the MFT itself.
Record 1: the MFT mirror record, which is a copy of the first 16 records of the MFT
Record 2: the NTFS volume’s logging file
Record 3: volume partition information, such as its name, NTFS version and creation date and time
Record 4: metadata regarding the NTFS file attributes used on the volume
Record 6: a map displaying which clusters on the volume are available for use
Record 7: a copy of the volume boot code
Record 8: a list of all the volume’s clusters that have been marked as unusable because of detected errors
Record 9: a table of disk quotas for NTFS 5.0 or later
Record 10: information for converting files to Unicode
Records 11-15: reserved for future metadata
The 17th record and those following it contain information for each file and directory on the NTFS volume in order to prevent excessive disk fragmentation as file on the NTFS are added, causing the MFT to grow.
