In computing, a NetWare File System (NWFS) is a file system based on a heavily optimized and journal based FAT file system. It was used in the Novell NetWareoperating system. It is the default and only file system for all volumes in versions 2.x through 4.x, and the default and only file system for the SYS volume continuing through version 5.x. Novell developed two varieties of NWFS:
16-bit NWFS 286, used in NetWare 2.x
32-bit NWFS 386, used in NetWare 3.x through NetWare 6.x.
The NWFS on-disk format was never publicly released by Novell, but it was released by former Novell engineers as an open source project on Windows, Linux, and DOS in 2000. The project contains an entire rewrite of the NetWare File System and publishes all of the file system internals and is hosted on github and gitlab.[1][2]
The published specifications[1] for 32-bit NWFS are:
Support for journaling (Novell Transaction Tracking System a.k.a. TTS)
Support for block suballocation, starting in NetWare 4.x
For larger files the file system utilized a performance feature named Turbo FAT.[citation needed]
Transparent file compression was also supported, although this had a significant impact on the performance of file serving.
Every name space requires its own separate directory entry for each file. While the maximum number of directory entries is 16,000,000, two resident name spaces would reduce the usable maximum number of directory entries to 8,000,000, and three to 5,333,333.
16-bit NWFS could handle volumes of up to 256 MB. However, its only name-space support was a dedicated API to handle Macintosh clients.
The Netware File System supported native RAID 0 and RAID 1 capabilities long before RAID systems came into use on personal computrs. Disk mirroring and duplexing were basic features of the file system, and NWFS also supported multi-segmented volumes, and round robin reads much like RAID 0 and RAID 1 does today.
^"netware-file-system: Open Source NetWare SMP File System for Linux, Windows, and DOS". GitHub. 2019-05-30. Retrieved 2024-04-03.
External linksedit
Using the Transaction Tracking System
April 12, 2024
netware, file, system, computing, nwfs, file, system, based, heavily, optimized, journal, based, file, system, used, novell, netware, operating, system, default, only, file, system, volumes, versions, through, default, only, file, system, volume, continuing, t. In computing a NetWare File System NWFS is a file system based on a heavily optimized and journal based FAT file system It was used in the Novell NetWare operating system It is the default and only file system for all volumes in versions 2 x through 4 x and the default and only file system for the SYS volume continuing through version 5 x Novell developed two varieties of NWFS 16 bit NWFS 286 used in NetWare 2 x 32 bit NWFS 386 used in NetWare 3 x through NetWare 6 x NWFSDeveloper s NovellFull nameNetWare File SystemPartition IDs0x64 NWFS 286 0x65 NWFS 386 0x66 NWFS 386 LimitsMax volume size1 TBMax file size4 GBFeaturesTransparentcompressionYesOtherSupportedoperating systemsNovell NetWare Novell Storage Services NSS released in 1998 superseded the NWFS format The NWFS on disk format was never publicly released by Novell but it was released by former Novell engineers as an open source project on Windows Linux and DOS in 2000 The project contains an entire rewrite of the NetWare File System and publishes all of the file system internals and is hosted on github and gitlab 1 2 The published specifications 1 for 32 bit NWFS are Maximum file size 4 GB Maximum volume size 1 TB Maximum files per volume 2 million when using a single name space Maximum files per server 16 million Maximum directory entries 16 million Maximum volumes per server 64 Maximum volumes per partition 8 Maximum open files per server 100 000 Maximum directory tree depth 100 levels Characters used ASCII double byte Maximum extended attributes 512 Maximum data streams 10 Support for different name spaces Microsoft Windows Long names a k a OS 2 namespace Unix Apple Macintosh Support for restoring deleted files salvage Support for journaling Novell Transaction Tracking System a k a TTS Support for block suballocation starting in NetWare 4 xFor larger files the file system utilized a performance feature named Turbo FAT citation needed Transparent file compression was also supported although this had a significant impact on the performance of file serving Every name space requires its own separate directory entry for each file While the maximum number of directory entries is 16 000 000 two resident name spaces would reduce the usable maximum number of directory entries to 8 000 000 and three to 5 333 333 16 bit NWFS could handle volumes of up to 256 MB However its only name space support was a dedicated API to handle Macintosh clients The Netware File System supported native RAID 0 and RAID 1 capabilities long before RAID systems came into use on personal computrs Disk mirroring and duplexing were basic features of the file system and NWFS also supported multi segmented volumes and round robin reads much like RAID 0 and RAID 1 does today See also editList of file systems Comparison of file systems Transaction Safe FAT File SystemReferences edit a b netware file system GitLab GitLab 2024 04 03 Retrieved 2024 04 03 netware file system Open Source NetWare SMP File System for Linux Windows and DOS GitHub 2019 05 30 Retrieved 2024 04 03 External links editUsing the Transaction Tracking System Retrieved from https en wikipedia org w index php title NetWare File System amp oldid 1217006347 TTS, wikipedia, wiki, book, books, library,
