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F2FS

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Computer Science
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Last edited
14 Sept 2026
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  1. F2FS
F2FS
Developer(s)Samsung Electronics, Motorola Mobility, Huawei and Google
Full nameFlash-Friendly File System
Introducedv3.8, 2012-12-201 with Linux
Directory contentsmulti-level hash table
File allocationbitmap (free space), table
BootableYes, starting from GRUB 2.04 (2019-07-05)
Max volume size16 TB with 4K blocks, 64 TB with 16K blocks2
Max file size3.94 TB with 4K blocks, 16 TB with 16K blocks3
Max no. of filesDepends on volume size
Max filename length255 bytes
4
Dates recordedmodification (mtime), attribute modification (ctime), access (atime)
Date resolution1 ns
AttributesPOSIX, extended attributes
File system permissionsPOSIX, ACL
Transparent compressionLZO, LZ4 (since Linux 5.6),5 zstd (since Linux 5.7)6
Transparent encryptionYes

F2FS (Flash-Friendly File System) is a flash file system initially developed by Samsung Electronics for the Linux kernel.7

The motive for F2FS was to build a file system that, from the start, takes into account the characteristics of NAND flash memory-based storage devices (such as solid-state disks, eMMC, and SD cards), which are widely used in computer systems ranging from mobile devices to servers.

F2FS was designed on a basis of a log-structured file system approach, which is adapted to newer forms of storage. Jaegeuk Kim, the principal F2FS author, has stated that it remedies some known issues7 of the older log-structured file systems, such as the snowball effect of wandering trees and high cleaning overhead. In addition, since a NAND-based storage device shows different characteristics according to its internal geometry or flash memory management scheme (such as the Flash Translation Layer or FTL), it supports various parameters not only for configuring on-disk layout, but also for selecting allocation and cleaning algorithms.

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General
  • Recent changes
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This article
Reading time
12 min
Topic
Computer Science
Quality
C-class
Views
614 in 14 days
Last edited
14 Sept 2026
Print/export
  • Printable version
In other projects
  • Wikidata item
Last edited
14 Sept 2026