Comparison of file systems


The following tables compare general and technical information for a number of computer file systems.

General information

File systemCreatorYear of introductionOriginal operating system
DECtapeDEC1964PDP-6 Monitor
OS/3x0 FSIBM1964OS/360
Level-DDEC1968TOPS-10
George 3ICT 1968George 3
Version 6 Unix file system Bell Labs1972Version 6 Unix
RT-11 file systemDEC1973RT-11
Disk Operating System GEC1973Core Operating System
CP/M file systemDigital Research 1974CP/M
Files-11 ODS-1DEC1975RSX-11
GEC DOS filing system extendedGEC1977OS4000
FAT (8-bit)Microsoft for NCR1977Microsoft Standalone Disk BASIC-80
DOS 3.xApple1978Apple DOS
UCSD p-SystemUCSD1978UCSD p-System
CBM DOSCommodore1978Commodore BASIC
Atari DOSAtari1979Atari 8-bit
Version 7 Unix file system Bell Labs1979Version 7 Unix
Files-11 ODS-2DEC1979OpenVMS
FAT12Seattle Computer Products 1980QDOS/86-DOS
ProDOSApple1980Apple SOS
DFSAcorn Computers Ltd1982Acorn BBC Micro MOS
ADFSAcorn Computers Ltd1983Acorn Electron
FFSKirk McKusick19834.2BSD
FAT16IBM, Microsoft1984PC DOS 3.0, MS-DOS 3.0
MFSApple1984System 1
Elektronika BK tape formatNPO "Scientific centre" 1985Vilnius Basic, BK monitor program
Hierarchical [File System (Apple)|HFS]Apple1985System 2.1
Amiga OFSMetacomco for Commodore1985Amiga OS
GEMDOSDigital Research1985Atari TOS
NWFSNovell1985NetWare 286
High SierraEcma International1986MSCDEX for MS-DOS 3.1/3.2
FAT16BCompaq1987Compaq MS-DOS 3.31
Minix V1 FSAndrew S. Tanenbaum1987MINIX 1.0
Amiga FFSCommodore1988Amiga OS 1.3
ISO 9660:1988Ecma International, ISO1988MS-DOS, "classic" Mac OS, and AmigaOS
HPFSIBM & Microsoft1989OS/2 1.2
ISO 9660: Rock Ridge extensionIEEEUnix
JFS1IBM1990AIX
VxFSVERITAS1991SVR4.0
extRémy Card1992Linux
AdvFSDEC1993Digital Unix
NTFSMicrosoft 1993Windows NT 3.1
LFSMargo Seltzer1993Berkeley Sprite
ext2Rémy Card1993Linux, Hurd
XiafsQ. Frank Xia1993Linux
UFS1Kirk McKusick19944.4BSD
XFSSGI1994IRIX
HFSIBM1994MVS/ESA
FAT16XMicrosoft1995MS-DOS 7.0 / Windows 95
ISO 9660: Joliet extensionMicrosoft1995Microsoft Windows, Linux, "classic" Mac OS, and FreeBSD
UDFISO/ECMA/OSTA1995
FAT32, FAT32XMicrosoft1996MS-DOS 7.1 / Windows 95 OSR2
QFSSun Microsystems1996Solaris
GPFSIBM1996AIX, Linux
Be File SystemBe Inc. 1996BeOS
Minix V2 FSAndrew S. Tanenbaum1997MINIX 2.0
HFS PlusApple1998Mac OS 8.1
NSSNovell1998NetWare 5
PolyServe File System PolyServe1998Windows, Linux
Files-11 ODS-5DEC1998OpenVMS V7.2
WAFLNetApp1998Data ONTAP
ext3Stephen Tweedie1999Linux
ISO 9660:1999Ecma International, ISO1999Microsoft Windows, Linux, "classic" Mac OS, FreeBSD, and AmigaOS
JFSIBM1999OS/2 Warp Server for e-business
GFSSistina 2000Linux
ReiserFSNamesys2001Linux
zFSIBM2001z/OS
FATXMicrosoft2002Xbox
UFS2Kirk McKusick2002FreeBSD 5.0
OCFSOracle Corporation2002Linux
SquashFSPhillip Lougher, Robert Lougher2002Linux
VMFS2VMware2002VMware ESX Server 2.0
LustreCluster File Systems2002Linux
FossilBell Labs2003Plan 9 version 4
Google File SystemGoogle2003Linux
ZFSSun Microsystems2004Solaris
Reiser4Namesys2004Linux
Non-Volatile File SystemPalm, Inc.2004Palm OS Garnet
BeeGFSFraunhofer/ 2005Linux
GlusterFSGluster Inc.2005Linux
Minix V3 FSAndrew S. Tanenbaum2005MINIX 3
OCFS2Oracle Corporation2005Linux
NILFSNTT2005Linux
VMFS3VMware2005VMware ESX Server 3.0
GFS2Red Hat2006Linux
ext4various2006Linux
exFATMicrosoft2006Windows CE 6.0
BtrfsChris Mason2007Linux
JXFSHyperion Entertainment2008AmigaOS 4.1
HAMMERMatthew Dillon2008DragonFly BSD 2.0
LSFSStarWind Software2009Linux, FreeBSD, Windows
UniFSNasuni2009Cloud
CASLNimble Storage2010Linux
OrangeFSOmnibond and others2011Linux
VMFS5VMware2011vSphere 5.0+
CHFSUniversity of Szeged2011NetBSD 6.0+
ReFSMicrosoft2012Windows Server 2012
F2FSSamsung Electronics2012Linux
bcachefsKent Overstreet2015Linux
APFSApple2016macOS High Sierra, iOS 10.3
NOVAUniversity of California, San Diego2017Linux
BlueStore/CephFSRed Hat, UC, Santa Cruz2017Linux
HAMMER2Matthew Dillon2017DragonFly BSD 5.0
EROFSHuawei2018Linux, Android
VaultFSSwiss Vault2022Linux / Unix

Metadata

File system
bcachefs
BeeGFS
CP/M file system
DECtape
Elektronika BK tape format
Level-D
RT-11
Version 6 Unix file system
Version 7 Unix file system
exFAT
FAT12/FAT16/FAT32
HPFS
NTFS
ReFS
HFS
HFS Plus
FFS
UFS1
UFS2
HAMMER
HAMMER2
LFS
EROFS
ext
Xiafs
ext2
ext3
ext4
NOVA
Lustre
F2FS
GPFS
GFS
NILFS
ReiserFS
Reiser4
OCFS
OCFS2
XFS
JFS
QFS
BFS
AdvFS
NSS
NWFS
Files-11 ODS-1
Files-11 ODS-2
Files-11 ODS-5
APFS
VxFS
UDF
Fossil
ZFS
Btrfs
Minix V1
Minix V2
Minix V3
VMFS2
VMFS3
ISO 9660:1988
ISO 9660: Rock Ridge extension
ISO 9660: Joliet extension
ISO 9660:1999
High Sierra
SquashFS
BlueStore/CephFS
File system

All widely used file systems record a last modified time stamp. It is not included in the table.
Individual file systems may record additional special types of date and time stamps. For example, the specification of ISO 9660 includes a "File Expiration Date and Time" and a "File Effective Date and Time".

Features

File capabilities


File systemHard linksSymbolic linksBlock journalingMetadata-only journalingCase-sensitiveCase-preservingFile Change LogXIP
DECtape
BeeGFS
Level-D
RT-11
APFS
Version 6 Unix file system
Version 7 Unix file system
exFAT
FAT12
FAT16 / FAT16B / FAT16X
FAT32 / FAT32X?
GFS
HPFS
NTFS
HFS Plus
FFS
UFS1
UFS2
HAMMER
HAMMER2
LFS
EROFS
ext
Xiafs
ext2
ext3
ext4, optional
NOVA
F2FS
Lustre
NILFS
ReiserFS
Reiser4
OCFS
OCFS2
XFS
JFS
QFS
BFS
NSS
NWFS
Files-11 ODS-1
Files-11 ODS-2
Files-11 ODS-5
UDF
VxFS
Fossil
ZFS
Btrfs
bcachefs, optional
Minix V1
Minix V2
Minix V3
VMFS2
VMFS3
ReFS
ISO 9660
ISO 9660: Rock Ridge extension
ISO 9660: Joliet extension
SquashFS
BlueStore/CephFS
File systemHard linksSymbolic linksBlock journalingMetadata-only journalingCase-sensitiveCase-preservingFile Change LogXIP

Block capabilities

Note that in addition to the below table, block capabilities can be implemented below the file system layer in Linux or Windows, etc.

File systemInternal snapshotting / branchingEncryptionDeduplicationData checksum/ ECCPersistent CacheMultiple DevicesCompressionSelf-healing
DECtape
BeeGFS
Level-D
RT-11
APFS
Version 6 Unix file system
Version 7 Unix file system
exFAT
FAT12
FAT16 / FAT16B / FAT16X
FAT32 / FAT32X
GFS
HPFS
NTFS
HFS Plus
FFS
UFS1
UFS2
HAMMER
HAMMER2
LFS
EROFS
ext
Xiafs
ext2
ext3
ext4, experimental
NOVA
F2FS, experimental
Lustre
NILFS, continuous
ReiserFS
Reiser4
OCFS
OCFS2
XFS
JFS only in JFS1 on AIX
QFS
BFS
NSS
NWFS
Files-11 ODS-2
Files-11 ODS-5
UDF
VxFS
Fossil
ZFS
Btrfs
bcachefs
Minix V1
Minix V2
Minix V3
VMFS2
VMFS3
ReFS
ISO 9660
ISO 9660: Rock Ridge extension
ISO 9660: Joliet extension
SquashFS
BlueStore/CephFS
File systemInternal snapshotting / branchingEncryptionDeduplicationData checksum/ ECCPersistent CacheMultiple DevicesCompressionSelf-healing

Resize capabilities

"Online" and "offline" are synonymous with "mounted" and "not mounted".
File systemHost OSOffline growOnline growOffline shrinkOnline shrinkAdd and remove physical volumes
exFATmisc.
FAT16 / FAT16B / FAT16Xmisc.
FAT32 / FAT32Xmisc.
NTFSWindows
ReFSWindows
HFSmacOS
HFS PlusmacOS
APFSmacOS
HAMMERDragonflyBSD
EROFSLinux
ext2Linux
ext3Linux
ext4Linux
NOVALinux
F2FSLinux
LustreLinux
XFSLinux
JFS2AIX
JFSLinux
NTFSLinux
ReiserFSLinux
Reiser4Linux
BtrfsLinux
bcachefsLinux
NILFSLinux
ZFSmisc.
UFS2FreeBSD
SquashFSLinux
BlueStore/CephFSLinux

Allocation and layout policies

File systemSparse filesBlock suballocationTail packingExtentsVariable block sizeInline data Allocate-on-flushCopy on writeTrim support
DECtape
BeeGFS
Level-D
APFS
Version 6 Unix file system
Version 7 Unix file system
exFAT
FAT12
FAT16 / FAT16B / FAT16X
FAT32 / FAT32X
GFS
HPFS
NTFS
HFS Plus
FFS 8:1
UFS1 8:1
UFS2 8:1 so far
HAMMER
HAMMER2
LFS 8:1
EROFS
ext
Xiafs
ext2
ext3
ext4
NOVA
F2FS
Lustre
NILFS
ReiserFS
Reiser4
OCFS
OCFS2
XFS , on request
JFS
QFS
BFS
NSS
NWFS
Files-11 ODS-5
VxFS
UDF, for write once read many media
Fossil
ZFS
Btrfs
bcachefs
VMFS2
VMFS3
ReFS
ISO 9660
ISO 9660: Rock Ridge extension
ISO 9660: Joliet extension
SquashFS
BlueStore/CephFS
File systemSparse filesBlock suballocationTail packingExtentsVariable block sizeInline data Allocate-on-flushCopy on writeTrim support

OS support

File systemDOSLinuxmacOSWindows 9x Windows Classic
Mac OS		FreeBSDOS/2BeOSMinixSolarisz/OSAndroid
DECtape
BeeGFS
Level-D
RT-11
APFS
Version 6 Unix file system
Version 7 Unix file system
exFAT
FAT12
FAT16 / FAT16B / FAT16X
FAT32 / FAT32X
GFS
HPFS
NTFS 3rd-party drivers Native since Linux Kernel 5.15 NTFS3. Older kernels may use backported NTFS3 driver or ntfs-3g 3rd-party drivers like Paragon [NTFS for Win98], DiskInternals NTFS Reader with ntfs-3g with ntfs-3g with ntfs-3g
HFS write support since Mac OS X 10.6 and no support at all since macOS 10.15 Paragon HFS+
HFS Plus - writing support only to unjournalled FS Paragon HFS+ from Mac OS 8.1
FFS
UFS1 - read only
UFS2
LFS
EROFS - since erofs-utils 1.4
ext - until 2.1.20
Xiafs - until 2.1.20

Experimental port available to 2.6.32 and later
ext2 Paragon ExtFS or ext2fsx Paragon ExtFS or partial with Ext2 IFS or ext2fsd
ext3 Paragon ExtFS or partial with ext2fsx Paragon ExtFS or partial with Ext2 IFS or ext2fsd
ext4 Paragon ExtFS, with the optional WSL2; physical and VHDX virtual disks. since FreeBSD 12.0
NOVA
F2FS
Lustre
NILFS as an external kernel module
ReiserFS - until 6.13 - Read Only from 6.0 to 10.x and dropped in 11.0
Reiser4 with a kernel patch
SpadFS
OCFS
OCFS2
XFS
JFS
QFS
Be File System - read-only
NSS via EVMS
NWFS
Files-11 ODS-2
Files-11 ODS-5
UDF
VxFS
Fossil
ZFS with FUSE or as an external kernel module with Read/Write Developer Preview
Btrfs with WinBtrfs
bcachefs
VMFS2
VMFS3
IBM HFS
IBM zFS
ReFS Paragon ReFS for Linux
ISO 9660
ISO 9660: Rock Ridge extension
ISO 9660: Joliet extension
SquashFS
BlueStore/CephFS
File systemDOSLinuxmacOSWindows 9x Windows Classic
Mac OS		FreeBSDOS/2BeOSMinixSolarisz/OSAndroid

Limits

While storage devices usually have their size expressed in powers of 10, filesystem limits are invariably powers of 2, so usually expressed with IEC prefixes. For instance, a 1 TiB limit means 240, 10244 bytes. Approximations using power of 10 are also given below to clarify.
File systemMaximum filename lengthAllowable characters in directory entriesMaximum pathname lengthMaximum file sizeMaximum volume sizeMax number of files
AdvFS255 charactersAny byte except and NULNo limit defined16 TiB 16 TiB
APFS255 UTF-8 charactersAny Unicode 9.0 character except and NUL8 EiB data-sort-type="number" data-sort-value="0" 263
bcachefs512 bytesAny byte except and NULNo limit defined8 EiB 2040 PiB 264
BeeGFS255 bytesAny byte except NULNo limit defined16 EiB 16 EiB
BFS255 bytesAny byte except NULNo limit defined12,288 bytes to 260 GiB 256 PiB to 2 EiB Unlimited
BlueStore/CephFS255 charactersany byte, except null, "/"No limit definedMax. 264 bytes, 1 TiB by defaultNot limitedNot limited, default is 100,000 files per directory
Btrfs255 bytesAny byte except and NULNo limit defined16 EiB 16 EiB 264
CBM DOS16 bytesAny byte except NULNo directory hierarchy 16 MiB 16 MiB
CP/M file system8.3ASCII except for < >., ; : = ? * No directory hierarchy 32 MiB 512 MiB
DECtape6.3A–Z, 0–9DTxN:FILNAM.EXT = 15369,280 bytes
369,920 bytes
Disk Operating System data-sort-type="number" data-sort-value="0" at least 131,072 bytesdata-sort-type="number" data-sort-value="0"
Elektronika BK tape format16 bytesNo directory hierarchy 64 KiB Not limited. Approx. 800 KiB for 90 min cassette
EROFS255 bytesAny byte except and NULNo limit defined16 EiB 1 EiB 264
exFAT255 UTF-16 charactersUnicode except for control codes 0x0000 - 0x001F or " * / : < > ? \ |32,760 characters with each path component no more than 255 characters16 EiB 64 ZiB
ext255 bytesAny byte except and NULNo limit defined2 GiB 2 GiB
ext2255 bytesAny byte except and NULNo limit defined16 GiB to 2 TiB 2 TiB to 32 TiB
ext3255 bytesAny byte except and NULNo limit defined16 GiB to 2 TiB 2 TiB to 32 TiB
ext4255 bytesAny byte except and NULNo limit defined16 GiB to 16 TiB 1 EiB 232
F2FS255 bytesAny byte except and NULNo limit defined4,228,213,756 KiB 16 TiB
FAT (8-bit)6.3 / 9 characters ASCII No directory hierarchy data-sort-type="number" data-sort-value="0" data-sort-type="number" data-sort-value="0"
FAT12/FAT168.3 SFN: OEM A-Z, 0–9, ! # $ % & ' - @ ^ _ ` ~, 0x80-0xFF, 0x20. LFN: Unicode except NUL, " * / : < > ? \ | No limit defined32 MiB 1 MiB to 32 MiB
FAT16B/FAT16X8.3 SFN: OEM A-Z, 0–9, ! # $ % & ' - @ ^ _ ` ~, 0x80-0xFF, 0x20. LFN: Unicode except NUL, " * / : < > ? \ | No limit defined2 GiB 16 MiB to 2 GiB
FAT32/FAT32X8.3 SFN: OEM A-Z, 0–9, ! # $ % & ' - @ ^ _ ` ~, 0x80-0xFF, 0x20. LFN: Unicode except NUL, " * / : < > ? \ | 32,760 characters with each path component no more than 255 characters4 GiB 512 MiB to 16 TiB
FATX42 bytesASCII.No limit defined2 GiB 16 MiB to 2 GiB
FFS255 bytesAny byte except and NULNo limit defined4 GiB 256 TiB
Files-11 ODS-19.3 in RADIX-50–, –, No limit defined; only two-level paths supported by operating systems2 TiB 2 TiB 216-1
Files-11 ODS-220 bytes–, –,,, 4,096 bytes2 TiB 2 TiB 224-1
Files-11 ODS-5236 bytesISO 8859-1 or UCS-24,096 bytes2 TiB 2 TiB
Fossildata-sort-type="number" data-sort-value="0" data-sort-type="number" data-sort-value="0"
GEC DOS filing system extended8 bytesA–Z, 0–9. Period was directory separator No limit defined data-sort-type="number" data-sort-value="0" at least 131,072 bytesdata-sort-type="number" data-sort-value="0"
GEMDOS8.3A-Z, a-z, 0-9 ! @ # $ % ^ & + - = ~ ` ; ' ", < > | _
GFS2255 bytesAny byte except and NULNo limit defined100 TiB to 8 EiB 100 TiB to 8 EiB
GFS255 bytesAny byte except and NULNo limit defined2 TiB to 8 EiB 2 TiB to 8 EiB
GPFS255 UTF-8 codepointsAny byte except NULNo limit defined9 EiB 524,288 YiB
HAMMER1023 bytesAny byte except and NULdata-sort-type="number" data-sort-value="0" 1 EiB
HFS31 bytesAny byte except ; in macOS, in file names is converted to in the file system, and and NUL are disallowedUnlimited2 GiB 2 TiB
HFS Plus255 UTF-16 code unitsAny valid Unicode character except ; in macOS, in file names is converted to in the file system, and and NUL are disallowedUnlimitedslightly less than 8 EiB slightly less than 8 EiB
High Sierra Formatdata-sort-type="number" data-sort-value="0" data-sort-type="number" data-sort-value="0"
HPFS255 bytesAny byte except NULNo limit defined2 GiB 2 TiB
IBM SFS8.8Non-hierarchicaldata-sort-type="number" data-sort-value="0"
ISO 9660:1988Level 1: 8.3,
Level 2 & 3: ~ 180		Depends on Level~ 180 bytes?4 GiB to 8 TiB 8 TiB
ISO 9660:1999data-sort-type="number" data-sort-value="0" data-sort-type="number" data-sort-value="0"
JFS255 bytesAny Unicode except NULNo limit defined4 PiB 32 PiB
JFS1255 bytesAny byte except and NULNo limit defined8 EiB 512 TiB to 4 PiB
ISO 9660: Joliet extension64 charactersAll UCS-2 code except *, /, \, :, ;, and ?same as ISO 9660:1988same as ISO 9660:1988
Level-D6.3A–Z, 0–9DEVICE:FILNAM.EXT = 7 + 10 + 15 = 32; + 5*7 for SFDs = 6734,359,738,368 words ; 206,158,430,208 SIXBIT bytesApprox 12 GiB
Lustre255 bytesAny byte except NULNo limit defined16 EiB on ZFS16 EiB
MFS255 bytesAny byte except No directory hierarchy 256 MiB 256 MiB
MicroDOS file system14 bytes16 MiB 32 MiB
Minix V1 FS14 or 30 bytes, set at filesystem creation timeAny byte except NULNo limit defined256.5 MiB 64 MiB
Minix V2 FS14 or 30 bytes, set at filesystem creation timeAny byte except NULNo limit defined2 GiB 1 GiB
Minix V3 FS60 bytesAny byte except NULNo limit defined2 GiB 4 GiB
NILFS255 bytesAny byte except and NULNo limit defined8 EiB 8 EiB
NOVA255 bytesAny byte except and NULNo limit defined16 EiB 16 EiB
NSS256 charactersDepends on namespace usedOnly limited by client8 TiB 8 TiB
NTFS255 charactersIn Win32 namespace: any UTF-16 code unit except as well as NUL
In POSIX namespace: any UTF-16 code unit except as well as NUL		32,767 characters with each path component up to 255 characters long.
However, the limit is approximate due to UNC, and some limitations may be removed on demand.		16 TiB to 8 PiB 16 TiB to 8 PiB 232
NWFS80 bytesDepends on namespace usedNo limit defined4 GiB 1 TiB
OCFS255 bytesAny byte except NULNo limit defined8 TiB 8 TiB
OCFS2255 bytesAny byte except NULNo limit defined4 PiB 4 PiB
QFS255 bytesAny byte except NULNo limit defined16 EiB 4 PiB
ReFS255 UTF-16 charactersIn Win32 namespace: any UTF-16 code unit except as well as NUL
In POSIX namespace: any UTF-16 code unit except as well as NUL		32,767 characters with each path component up to 255 characters long16 EiB 1 YiB
ReiserFS4032 bytes/255 charactersAny byte except and NULNo limit defined8 TiB, 4 GiB 16 TiB
Reiser43976 bytesAny byte except and NULNo limit defined8 TiB on x86data-sort-type="number" data-sort-value="0"
ISO 9660: Rock Ridge extension255 bytesAny byte except and NULNo limit definedsame as ISO 9660:1988same as ISO 9660:1988
RT-116.3 in RADIX-50–, –, No directory hierarchy 33,554,432 bytes
33,554,432 bytes
SquashFS256 bytesNo limit defined16 EiB 16 EiB
UDF255 bytesAny Unicode except NUL1,023 bytes16 EiB 512 MiB to 16 TiB
UFS1255 bytesAny byte except and NULNo limit defined16 GiB to 256 TiB 16 EiB Subdirectory per directory is 32,767
UFS2255 bytesAny byte except and NULNo limit defined512 GiB to 32 PiB 512 ZiB Subdirectory per directory is 32,767
UniFSNo limit defined No limit defined Available cache space at time of write No limit definedNo limit defined
VaultFSconfigurable Any byte except NULNo limit definedNo limit definedNo limit definedNo limit defined
Version 6 Unix file system 14 bytesAny byte except and NULNo limit defined16 MiB 32 MiB
Version 7 Unix file system 14 bytesAny byte except and NULNo limit defined1 GiB 2 TiB
VMFS2128Any byte except NUL or 2,0484 TiB 64 TiB
VMFS3128Any byte except NUL or 2,0482 TiB 64 TiB
VxFS255 bytesAny byte except and NULNo limit defined16 EiB data-sort-type="number" data-sort-value="0"
XFS255 bytesAny byte except and NULNo limit defined8 EiB 8 EiB 264
Xiafs248 bytesAny byte except NULNo limit defined64 MiB 2 GiB
ZFS1023 bytesAny byte except and NULNo limit defined16 EiB 268,435,456 QiB 2128
File systemMaximum filename lengthAllowable characters in directory entriesMaximum pathname lengthMaximum file sizeMaximum volume sizeMax number of files

File systemStart date End date Granularity
FAT12, FAT16, FAT321980-01-01 00:00:002107-12-31 23:59:582 seconds
NTFS1601-01-0160056-05-280.0000001 seconds
exFAT 1980-01-012107-12-310.01 seconds
ext2, ext31901-12-142038-01-191 second
ext41901-12-142446-05-100.000000001 seconds
BtrFS1970-01-01 00:00:002554-07-21 23:34:330.000000001 seconds
JFS0.000000001 seconds
XFS1901-12-132486-07-020.000000001 seconds
ReiserFS1901-12-142038-01-191 second
tux30.00390625 seconds
ISO 96600001-01-019999-12-310.01 seconds
UDF0001-01-019999-12-310.000001 seconds
HFS Plus1904-01-012040-02-061 second

GranularitySub-microsecondSub-millisecondSub-secondOne secondAbove one second
File systemsext4, BtrFS, JFS, XFS, NTFSUDFexFAT, ISO 9660, tux3ext2, ext3, ReiserFS, HFS PlusFAT