Windows File System
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- File number corresponds to the file location in the MFT
- Sequence number with the documented increase reuse, allowing NTFS to complete the internal consistency checks.
5. Documentation
NTFS is not only as a text file or binary data library, but rather as a collection of many file attribute / property values to deal with.
In addition to data attributes, other file attributes, including file name, time stamp, file holders and so on.
6. File Name
NTFS and FAT path of each file name / directory name length up to 255 bytes, and can contain Unicode characters, multiple periods and spaces.
MS-DOS can not correctly identify the Win32 file names, so NTFS automatically generated MS-DOS file names 8 characters (plus three-character extension) or less.
Windows NT POSIX subsystem needs to support all the applications of the biggest names in the space environment, and therefore, NTFS namespace equal POSIX namespace. POSIX subsystem can be created in Win32 and MS-DOS name is not visible.
7. Resident and non-resident property attributes
If the property value in the MFT file can be stored directly in the property known as resident property.
Small small files or directories can all attributes resident in the MFT. If the property value is stored directly in the MFT, the NTFS disk only once to gain access to the data; while the FAT file system must first find the file in the FAT table, read out a continuous distribution of units in order to find the file data.
8. File Name Index
In NTFS file directory index just a file name. That in order to facilitate quick access while in a special way to organize a collection of file names.
To create a directory, NTFS cope directory name of the file attributes index.
9. Data Compression
NTFS compression feature for individual files, entire directories, or entire directory tree volume compression. NTFS compression on the implementation of user data only, and can not be performed on the file system metadata.
The GetVolumeInformation Win32 function can determine whether a volume has been compressed; GetCompressedFileSize function get actual compressed size of a file; DeviceIoControl function to check or change the compression settings to a file or directory.
Data compression can reduce the disk space, but decompression requires large amounts of data for each operation. If you want to copy a compressed file, the process is unzip, copy, re-compressed copy of the file.
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