---
name: "defrag.f2fs"
section: "8"
platform: "linux"
package: "f2fs-tools"
version: "1.17.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/defrag.f2fs"
---

# defrag.f2fs(8)

relocate blocks in a given area to the specified region

## NAME

defrag.f2fs - relocate blocks in a given area to the specified region

## SYNOPSIS

**defrag.f2fs** \[ **-s** *start block address* \] \[ **-l** *number of blocks* \] \[ **-t** *target block address* \] \[ **-H** \] \[ **-i** *direction* \] \[ **-d** *debugging-level* \] *device*

## DESCRIPTION

**defrag.f2fs** is used to move specified number of blocks starting from a given block address to the target block address with a direction. *device* is the special file corresponding to the device (e.g. */dev/sdXX*).

For example, # defrag.f2fs -s 0x4000 -l 0x100 -t 0x10000 -i /dev/sdb1

This moves blocks between 0x4000 and 0x4100 to the left-hand area of 0x10000.

The exit code returned by **defrag.f2fs** is 0 on success and -1 on failure.

## OPTIONS

- **-s** *start block address*

  Specify the starting block address.

- **-l** *number of blocks*

  Specify the number of blocks to move.

- **-t** *target block address*

  Specify the destination block address.

- **-H**

  Specify support write hint.

- **-i** *direction*

  Set the direction to left. If it is not set, the direction becomes right by default.

- **-d** *debug-level*

  Specify the level of debugging options. The default number is 0, which shows basic debugging messages.

- This version of

  ## AUTHOR

**defrag.f2fs** has been written by Jaegeuk Kim \<jaegeuk@kernel.org\>.

## AVAILABILITY

**defrag.f2fs** is available from git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git.

## SEE ALSO

**[mkfs.f2fs(8)](/mkfs.f2fs/8.md),** **[dump.f2fs(8)](/dump.f2fs/8.md),** **[fsck.f2fs(8)](/fsck.f2fs/8.md),** **[resize.f2fs(8)](/resize.f2fs/8.md),** **[sload.f2fs(8)](/sload.f2fs/8.md).**