Contents

  1. Things you need to know
  2. Status
  3. Usage
  4. See also

F2FS is a FileSystem for Linux optimized for Flash storage. It was originally introduced in kernel v3.8, on 2012-12-20.

F2FS is popular on portable devices such as smartphones and tablets and uncommon on desktops and servers.

For more information about it, follow the links in the See Also section.

Things you need to know

F2FS is a log-structured file system designed to accommodate the characteristics of storage devices that use NAND flash memory, like Secure Digital (SD) and eMMC drives.

F2FS supports:

Status

F2FS is available in Buster, Testing and Unstable

Usage

Enabling compression

To create a compressed FS, f2fs-tools at version >= 1.14.0-1 is required 

   1 dev=/dev/CHANGEME
   2 mnt=/mnt/CHANGEME
   3 # Enable compression on FS creation
   4 sudo mkfs.f2fs -f -O extra_attr,compression $dev
   5 # (or enable encryption and compression)
   6 # sudo mkfs.f2fs -f -O encrypt,extra_attr,compression $dev
   7 
   8 # Also at mount time
   9 sudo mount -o compress_algorithm=zstd $dev $mnt
  10 
  11 ## Compression demo ##
  12 # create a directory and enable compression on it
  13 sudo mkdir $mnt/comp
  14 sudo chattr -R -V +c $mnt/comp
  15 
  16 # Write a compression-friendly file
  17 sudo cp /etc/dictionaries-common/words $mnt/comp
  18 # du shows the uncompressed size
  19 du -h $mnt/comp/words
  20 # notice: df might be misleading
  21 # Show F2FS status:
  22 sudo cat /sys/kernel/debug/f2fs/status

See also

CategoryKernel | ?CategoryFileSystem | CategorySystemAdministration