Clus MFT RecordLimits. Max. volume size. TB 6. 4 KB implementation3Max. Ei. B 1 KB format 1. TB 6. 4 KB Windows 7, Windows Server 2. R2 or earlier implementation3 2. TB 6. 4 KB Windows 8, Windows Server 2. Max. number of files. Max. filename length. UTF 1. 6 code units5Allowed characters in filenames. In Win. 32 namespace any UTF 1. NUL5In POSIX namespace any UTF 1. NULFeatures. Dates recorded. Creation, modification, POSIX change, access. Date range. 1 January 1. May 6. 00. 56 File times are 6. Date resolution. 10. Forks. Yes see Alternate data streams ADS belowAttributes. Read only, hidden, system, archive, not content indexed, off line, temporary, compressed. File system permissions. ACLs. Transparent compression. Per file, LZ7. 7 Windows NT 3. Transparent encryption. Per file,DESX Windows 2. Triple DES Windows XP onward,AES Windows XP Service Pack 1, Windows Server 2. Data deduplication. Yes Windows Server 2. Other. Supported operating systems. Windows NT 3. 1 and later. Mac OS X 1. 0. 3 and later read onlyLinux kernel version 2. Linux kernel versions 2. React. OS read onlyNTFS New Technology File System1 is a proprietaryfile system developed by Microsoft. Starting with Windows NT 3. Windows NT family. NTFS has several technical improvements over the file systems that it superseded File Allocation Table FAT and High Performance File System HPFS such as improved support for metadata and advanced data structures to improve performance, reliability, and disk space use. Additional extensions are a more elaborate security system based on access control lists ACLs and file system journaling. NTFS is supported in other desktop and server operating systems as well. Linux and BSD have a free and open source driver for NTFS with both read and write functionality. OS comes with read only support for NTFS its disabled by default write support for NTFS is unstable. HistoryeditIn the mid 1. Microsoft and IBM formed a joint project to create the next generation of graphical operating system the result was OS2 and HPFS. Because Microsoft disagreed with IBM on many important issues they eventually separated OS2 remained an IBM project and Microsoft worked to develop Windows NT and NTFS. The HPFS file system for OS2 contained several important new features. When Microsoft created their new operating system, they borrowed many of these concepts for NTFS. NTFS developers include Tom Miller, Gary Kimura, Brian Andrew and David Goebel. Probably as a result of this common ancestry, HPFS and NTFS use the same disk partition identification type code 0. Using the same Partition ID Record Number is highly unusual, since there were dozens of unused code numbers available, and other major file systems have their own codes. For example, FAT has more than nine one each for FAT1. FAT1. 6, FAT3. 2, etc. Algorithms identifying the file system in a partition type 0. HPFS and NTFS. VersionseditMicrosoft has released five versions of NTFS The NTFS. Windows 2. 00. 0 is based on the operating system version it should not be confused with the NTFS version number v. Windows XP. 1. 2Although subsequent versions of Windows added new file system related features, they did not change NTFS itself. For example, Windows Vista implemented NTFS symbolic links, Transactional NTFS, partition shrinking, and self healing. NTFS symbolic links are a new feature in the file system all the others are new operating system features that make use of NTFS features already in place. FeatureseditNTFS v. Encrypting File System EFS. ScalabilityeditNTFS is optimized for 4 KBclusters, but supports a maximum cluster size of 6. KB. 1. 4 The maximum NTFS volume size that the specification can support is 2. The maximum NTFS volume size implemented in Windows XP Professional is 2. For example, using 6. KB clusters, the maximum size Windows XP NTFS volume is 2. TB minus 6. 4 KB. Using the default cluster size of 4 KB, the maximum NTFS volume size is 1. TB minus 4 KB. Both of these are vastly higher than the 1. GB limit in Windows XP SP1. Because partition tables on master boot record MBR disks support only partition sizes up to 2 TB, multiple GUID Partition Table GPT or dynamic volumes must be combined to create a single NTFS volume larger than 2 TB. Booting from a GPT volume to a Windows environment in a Microsoft supported way requires a system with Unified Extensible Firmware Interface UEFI and 6. The NTFS maximum theoretical limit on the size of individual files is 1. Ei. B 1. 6 1. 02. KB, which totals to 1. With Windows 8 and Windows Server 2. TB minus 6. 4 KB or 2. JournalingeditNTFS is a journaling file system and uses the NTFS Log Log. File to record metadata changes to the volume. It is a feature that FAT does not provide and critical for NTFS to ensure that its complex internal data structures will remain consistent in case of system crashes or data moves performed by the defragmentation API, and allow easy rollback of uncommitted changes to these critical data structures when the volume is remounted. Notably affected structures are the volume allocation bitmap, modifications to MFT records such as moves of some variable length attributes stored in MFT records and attribute lists, and indices for directories and security descriptors. The USN Journal Update Sequence Number Journal is a system management feature that records in ExtendUsn. Jrnl changes to files, streams and directories on the volume, as well as their various attributes and security settings. The journal is made available for applications to track changes to the volume. This journal can be enabled or disabled on non system volumes. Hard linkseditThe hard link feature allows different file names to directly refer to the same file contents. Hard links are similar to directory junctions, but refer to files instead. Hard links may link only to files in the same volume, because each volume has its own MFT. Hard links have their own file metadata, so a change in file size or attributes under one hard link may not update the others until they are opened. Hard links were originally included to support the POSIX subsystem in Windows NT. Windows uses hard links to support short 8. NTFS. Operating system support is needed because there are legacy applications that can work only with 8. In this case, an additional filename record and directory entry is added, but both 8. The NTFS file system has a limit of 1. Alternate data streams ADSeditAlternate data streams allow more than one data stream to be associated with a filename a fork, using the format filename streamname e. NTFS Streams were introduced in Windows NT 3. Services for Macintosh SFM to store resource forks. Although current versions of Windows Server no longer include SFM, third party Apple Filing Protocol AFP products such as Group. Logics Extreme. Z IP still use this feature of the file system. Very small ADS named Zone. Identifier are added by Internet Explorer and recently by other browsers to mark files downloaded from external sites as possibly unsafe to run the local shell would then require user confirmation before opening them. Skate And Destroy Font Download. When the user indicates that they no longer want this confirmation dialog, this ADS is deleted. Alternate streams are not listed in Windows Explorer, and their size is not included in the files size. When the file is copied or moved to another file system without ADS support the user is warned that alternate data streams cannot be preserved. No such warning is typically provided if the file is attached to an e mail, or uploaded to a website.