---
name: "mkfs.reiser4"
section: "8"
platform: "linux"
package: "reiser4progs"
version: "1.2.2-1+b1"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/mkfs.reiser4"
---

# mkfs.reiser4(8)

the program for creating reiser4 filesystem.

## NAME

mkfs.reiser4 - the program for creating reiser4 filesystem.

## SYNOPSIS

**mkfs.reiser4** \[ options \] FILE1 FILE2 ... \[ size\[K\|M\|G\] \]

## DESCRIPTION

**mkfs.reiser4** is reiser4 filesystem creation program. It is based on new libreiser4 library. Since libreiser4 is fully plugin-based, we have the potential to create not just reiser4 partitions, but any filesystem or database format, which is based on balanced trees.

## COMMON OPTIONS

- **-V, --version**

  prints program version.

- **-?, -h, --help**

  prints program help.

- **-y, --yes**

  assumes an answer 'yes' to all questions.

- **-f, --force**

  forces mkfs to use whole disk, not block device or mounted partition.

## MKFS OPTIONS

- **-b, --block-size N**

  block size to be used (architecture page size by default)

- **-L, --label LABEL**

  volume label to be used

- **-U, --uuid UUID**

  universally unique identifier to be used

- **-s, --lost-found**

  forces mkfs to create lost+found directory.

- **-d, --discard**

  tells mkfs to discard given device before creating the filesystem (for solid state drives).

## PLUGIN OPTIONS

- **-p, --print-profile**

  prints the plugin profile. This is the set of default plugins used for all parts of a filesystem -- format, nodes, files, directories, hashes, etc. If --override is specified, then prints modified plugins.

- **-l, --print-plugins**

  prints all plugins libreiser4 know about.

- **-o, --override TYPE=PLUGIN, ...**

  overrides the default plugin of the type "TYPE" by the plugin "PLUGIN" in the plugin profile.

  Examples:

  assign short key plugin to "key" field in order to create filesystem with short keys policy:

  mkfs.reiser4 -yf -o key=key\_short /dev/hda2

## REPORTING BUGS

Report bugs to \<reiserfs-devel@vger.kernel.org\>

## SEE ALSO

**[measurefs.reiser4(8)](/measurefs.reiser4/8.md),** **[debugfs.reiser4(8)](/debugfs.reiser4/8.md),** **[fsck.reiser4(8)](/fsck.reiser4/8.md)**

## AUTHOR

This manual page was written by Yury Umanets \<umka@namesys.com\>