Filesystem

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{{FormatInfo
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|[[Filesystem]]
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'''Filesystems''' are [[Electronic_File_Formats|Electronic Formats]] that are a prerequisite to being able to read any [[file]] off a digital medium — you have to be able to mount the filesystem, and thus read it, in order to be able to read a file.
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Filesystems are [[Electronic_File_Formats|Electronic Formats]] that are a prerequisite to being able to read any file off a digital medium — you have to be able to mount the filesystem, and thus read it, in order to be able to read a file.
+
== Single-system filesystems ==
 +
(How files are organized on one system, device, or medium, such as a disk, tape, or flash memory; see next category for networked and cloud filesystems. Of course, any filesystem can be made available on a network to remote devices, but these are the native filesystems present on the storage device/medium itself.)
  
 +
* [[+D filesystem]] (Sinclair, SAM Coupé)
 
* [[Acer Fast Filesystem]] (SCO OpenServer)
 
* [[Acer Fast Filesystem]] (SCO OpenServer)
 
* [[ADFS]] (Acorn MOS, RISC OS)
 
* [[ADFS]] (Acorn MOS, RISC OS)
* [[AdvFS]](Advanced File System, Digital/Tru64 Unix)
+
* [[AdvFS]] (Advanced File System, Digital/Tru64 Unix)
* [[Ami File Safe]] (Amiga)
+
* [[Ami-FileSafe]] (AFS, Amiga)
* [[Apple DOS file system]] (Apple II)
+
* [[APF Imagination Machine disk file system]]
* [[AthFS]] (AtheOS/Syllable)
+
* [[Apple DOS file system]] (Apple II; see also ProDOS below)
 +
* [[Apple File System]] (APFS) (2017 system for Apple devices)
 +
* [[Atari File Management Subsystem]] (FMS: Atari 400/800)
 +
* [[AtheOS File System]] (AtheOS/Syllable)
 +
* [[BetrFS]] [http://www.betrfs.org/]
 
* [[BFS]] (BeOS)
 
* [[BFS]] (BeOS)
* [[btrfs]] (Linux)
+
* [[Btrfs]] (Linux)
* [[CBMFS]] (Commodore 64)
+
* [[CBMFS]] (Commodore 64, PET, etc.; 5.25" disks)
 +
** [[Commodore 1581 filesystem]] (3.5" disks)
 +
** [[GEOS VLIR]] (GEOS Variable Length Index Record )
 
** [[CMDFS]] (CBMFS extension by Creative Micro Designs)
 
** [[CMDFS]] (CBMFS extension by Creative Micro Designs)
 +
* [[Compucolor file system]]
 
* [[CP/M file system]]
 
* [[CP/M file system]]
 +
* [[cramfs]]
 +
* [[Cromfs]] [https://bisqwit.iki.fi/source/cromfs.html]
 
* [[DDFS]] (Data Domain File System)
 
* [[DDFS]] (Data Domain File System)
 
* [[DTFS]] (Desktop File System, [[SCO OpenServer]])
 
* [[DTFS]] (Desktop File System, [[SCO OpenServer]])
 
* [[EFS]] (Extent File System, SGI IRIX. Replaced by [[XFS]])
 
* [[EFS]] (Extent File System, SGI IRIX. Replaced by [[XFS]])
* [[exFAT]] (Microsoft, for flash memory)
+
* [[EOS file system (Coleco)]] (Coleco ADAM "data pack" tape drives and disks)
 
* [[ext]] (developed for Linux, previously used MINIX fs)
 
* [[ext]] (developed for Linux, previously used MINIX fs)
 
* [[ext2]], [[ext3]], [[ext4]] (these are all just variants of each other)
 
* [[ext2]], [[ext3]], [[ext4]] (these are all just variants of each other)
 
* [[F2FS]], (Flash Friendly Filesystem)
 
* [[F2FS]], (Flash Friendly Filesystem)
* [[FAT12]]
+
* [[FAT]]
* [[FAT16]]
+
** [[FAT8]]
* [[FAT32]]
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** [[FAT12]]
 +
** [[FAT16]]
 +
** [[FAT32]]
 +
** [[exFAT]] (Microsoft, for flash memory)
 
* [[FFS]] (Amiga Fast File System)
 
* [[FFS]] (Amiga Fast File System)
 
* [[Files-11]] (VMS)
 
* [[Files-11]] (VMS)
 +
* [[Firmware File System]]
 
* [[Fossil]] (Plan 9)
 
* [[Fossil]] (Plan 9)
 
* [[HAMMER]] (DragonflyBSD)
 
* [[HAMMER]] (DragonflyBSD)
* [[HFS]]
+
** [[HAMMER2]] (successor to HAMMER)
 +
* [[HFS]] (MacOS)
 
* [[HFS+]]
 
* [[HFS+]]
 
* [[HPFS]] (OS/2 native file system)
 
* [[HPFS]] (OS/2 native file system)
* [[ISO 9660]]
+
* [[ISO 9660]] (optical discs)
* [[JFFS2]]
+
* [[JFFS]]
 +
** [[JFFS2]]
 
* [[LanyFS]] (Lanyard Filesystem)
 
* [[LanyFS]] (Lanyard Filesystem)
 +
* [[Linear Tape File System]] (LTFS)
 
* [[LogFS]]
 
* [[LogFS]]
 
* [[MDR (Floppy Disk)|MDR]] (audio instrument format close to MSDOS)
 
* [[MDR (Floppy Disk)|MDR]] (audio instrument format close to MSDOS)
 
* [[MFS]] (ancient Macintosh filesystem)
 
* [[MFS]] (ancient Macintosh filesystem)
 
* [[MINIX file system]]
 
* [[MINIX file system]]
* [[NILFS2]]
+
* [[NILFS]] (and NILFS2)
* [[NetWare File System]] (Novell NetWare, replaced by [[NSS]])
+
* [[North Star DOS file system]]
* [[NSS]] (Novell Storage Services)
+
* [[NOVA (filesystem)|NOVA]]
 
* [[NTFS]]
 
* [[NTFS]]
* [[POHMELFS]] (distributed Linux filesystem)
+
* [[OFS]] (Amiga Old File System)
 +
* [[PFS]] (Professional File System, Amiga)
 
* [[PRAMFS]] (Persistent & Protected RAM File-System)
 
* [[PRAMFS]] (Persistent & Protected RAM File-System)
* [[ProDOS file system]] (Apple)
+
* [[ProDOS file system]] (Apple II) (also used in Apple III SOS)
 
* [[QFS]]
 
* [[QFS]]
 
* [[ReFS]] (Microsoft's new FS- Resilient Filesystem, on Windows 8 Server)
 
* [[ReFS]] (Microsoft's new FS- Resilient Filesystem, on Windows 8 Server)
 
* [[ReiserFS]]
 
* [[ReiserFS]]
 
** [[Reiser4]]
 
** [[Reiser4]]
* [[SDFS]] (Deduplication based filesystem)
+
* [[SDFS]] (OpenDedup deduplication based filesystem)
 +
* [[securefs]] [https://github.com/netheril96/securefs]
 +
* [[SFS (Amiga)|SFS]] (Smart File System, Amiga)
 +
* [[Sinclair QL filesystem]]
 
* [[SkyFS]] (SkyOS)
 
* [[SkyFS]] (SkyOS)
* [[squashfs]]
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* [[Squashfs]]
 +
* [[TFS]] [https://github.com/redox-os/tfs]
 +
* [[TI-99/4A file system]]
 +
* [[TR-DOS filesystem]] (ZX Spectrum)
 +
* [[TRSDOS file system]] (Tandy)
 +
* [[UBIFS]]
 
* [[UCSD p-System Filesystem]] (UCSD Pascal)
 
* [[UCSD p-System Filesystem]] (UCSD Pascal)
* [[UDF]]
+
* [[UFS]] (Unix File System, Solaris and BSD)
* [[UFS]] (Unix Files System, Solaris and BSD)
+
 
** [[UFS2]]
 
** [[UFS2]]
 +
* [[Universal Disk Format]] (UDF) (optical discs)
 
* [[VMUFAT]] (Filesystem for Dreamcast VMU units)
 
* [[VMUFAT]] (Filesystem for Dreamcast VMU units)
* [[VxFS]]
+
* [[VSAM]] (Virtual Storage Access Method)
 +
* [[VxFS]] (VERITAS File System)
 
* [[WAFL]] (NetApp's commercial file system)
 
* [[WAFL]] (NetApp's commercial file system)
 +
* [[WBFS]]
 
* [[Xiafs]] (Linux, dropped in favour of ext2)
 
* [[Xiafs]] (Linux, dropped in favour of ext2)
 
* [[XFS]] (SGI)
 
* [[XFS]] (SGI)
* [[XtreemFS]], (Linux, distributed file system)
 
 
* [[YAFFS]]
 
* [[YAFFS]]
 
* [[ZFS]]
 
* [[ZFS]]
 +
* [[zisofs]]
 +
 +
== Networked and cloud filesystems ==
 +
(Used to make files available to/from multiple systems over a local or wide area network, including "on the cloud" via the Internet; systems access files through a protocol or API. The low-level storage details, usually concealed from end users and even most developers, may be within one or more of the single-device filesystems above, and the networked/cloud filesystem is generally defined independently of such details and might have very different characteristics and rules as to how the files are named, addressed, and structured.)
 +
 +
* [[Amazon S3]]
 +
* [[Andrew File System]] (Carnegie Mellon University)
 +
* [[EOS file system (CERN)]] (open-source file system used at CERN)
 +
* [[Google Drive]]
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* [[Google File System]]
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* [[Hadoop Distributed File System]] (HDFS)
 +
* [[IPFS]]
 +
* [[Keybase filesystem]]
 +
* [[Longaccess]]
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* [[MEGA file system]]
 +
* [[NetWare File System]] (Novell NetWare, replaced by [[NSS]])
 +
* [[NFS]] (Unix network filesystem protocol)
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* [[NSS]] (Novell Storage Services)
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* [[OneDrive]] (Microsoft)
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* [[OpenStack Swift]]
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* [[Permacoin]] (also a [[currency]])
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* [[POHMELFS]] (distributed Linux filesystem)
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* [[SDFS]] (OpenDedup deduplication based filesystem)
 +
* [[SFS]] (SyncFS)
 +
* [[SMB]] (Server Message Block, a protocol for a networked filesystem)
 +
* [[Storj]] (another currency/filesystem scheme)
 +
* [[WebDAV]] (network filesystem implemented as extensions to HTTP)
 +
* [[XtreemFS]], (Linux, distributed file system)
 +
 +
== Virtual filesystems ==
 +
* [[%clay vane]] (Urbit)
 +
* [[AVFS]]
 +
* [[FUSE]]
 +
* [[GnomeVFS]]
 +
** [[GVfs (GNOME)]]
 +
* [[Virtual File System for Git]] (was GVFS)
 +
 +
== Other / Misc. ==
 +
* [[πfs]]
 +
* [[BrowserFS]]
 +
* [[SAFS]]
 +
 +
== File content signature ==
 +
(used to match files to a hash table or similar system in order to detect duplicates, help find specific files when their exact
 +
location is unknown, handle distributed networked filesystems, etc. See also [[Error detection and correction]].)
 +
 +
* [[FWKCS]]
 +
 +
== Format details ==
 +
* [[AAIP]]
 +
* [[AppleDouble]]
 +
* [[Apple ISO 9660 extensions]]
 +
* [[Apple Partition Map]]
 +
* [[AppleSingle]]
 +
* [[ARCHIMEDES ISO 9660 extension]]
 +
* [[desktop.ini]] (Windows)
 +
* [[Desktop Services Store]] (Mac OS X)
 +
* [[DOS/Windows file attributes]]
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* [[El Torito]]
 +
* [[GUID Partition Table]]
 +
* [[Isofs transparent compression]]
 +
* [[Joliet]]
 +
* [[Master Boot Record]] (MBR)
 +
* [[RAID]]
 +
* [[Resource Fork]] (MacOS)
 +
* [[Rock Ridge]]
 +
* [[System Use Sharing Protocol]] (SUSP)
 +
* [[TRANS.TBL]]
 +
 +
== Links ==
 +
* [[Wikipedia:List of file systems|List of file systems (Wikipedia)]]
 +
* [http://www.dreamhost.com/dreamscape/2013/09/12/cloud-storage-architectures/ Cloud Storage Architectures]
 +
* [https://www.usenix.org/legacy/event/hotos09/tech/full_papers/seltzer/seltzer.pdf Hierarchical File Systems are Dead]
 +
* [http://qanda.digipres.org/176/filesystem-checksums-value-digital-preservation-context Do filesystem-based checksums add value in a digital preservation context?]
 +
* [http://lists.gnu.org/archive/html/coreutils/2014-08/msg00012.html My experience with using cp to copy a lot of files (432 millions, 39 TB)]
 +
* [https://www.csail.mit.edu/crash_tolerant_data_storage Crash-proof filesystem]
 +
* [http://l-o-c-a-l-h-o-s-t.com/wiki/doku.php?id=localhost:events:rwx:know_your_filesystem Know Your Filesystem]
 +
* [https://danluu.com/file-consistency/ File crash consistency and filesystems are hard]

Latest revision as of 21:55, 8 September 2019

File Format
Name Filesystem
Ontology

{{{caption}}}

Filesystems are Electronic Formats that are a prerequisite to being able to read any file off a digital medium — you have to be able to mount the filesystem, and thus read it, in order to be able to read a file.

Contents

[edit] Single-system filesystems

(How files are organized on one system, device, or medium, such as a disk, tape, or flash memory; see next category for networked and cloud filesystems. Of course, any filesystem can be made available on a network to remote devices, but these are the native filesystems present on the storage device/medium itself.)

[edit] Networked and cloud filesystems

(Used to make files available to/from multiple systems over a local or wide area network, including "on the cloud" via the Internet; systems access files through a protocol or API. The low-level storage details, usually concealed from end users and even most developers, may be within one or more of the single-device filesystems above, and the networked/cloud filesystem is generally defined independently of such details and might have very different characteristics and rules as to how the files are named, addressed, and structured.)

[edit] Virtual filesystems

[edit] Other / Misc.

[edit] File content signature

(used to match files to a hash table or similar system in order to detect duplicates, help find specific files when their exact location is unknown, handle distributed networked filesystems, etc. See also Error detection and correction.)

[edit] Format details

[edit] Links

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