Welcome to the Reiser4 Wiki, the Wiki for users and developers of the ReiserFS and Reiser4 filesystems.

For now, most of the documentation is just a snapshot of the old Namesys site (archive.org, 2007-09-29).

There was also a Reiser4 Wiki (archive.org, 2007-07-06) once on pub.namesys.com.

Reiser4 Howto

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Revision as of 23:10, 1 November 2012 by Edward (Talk | contribs)

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As reiser4 is not in mainline yet, we have to apply the right patch to get this working:

wget http://downloads.sourceforge.net/project/reiser4/reiser4-for-linux-3.x/reiser4-for-3.6.4.patch.gz
cd /usr/src/linux
gzip -dc ~/reiser4-for-3.6.4.patch.gz | patch -p1

Now enable CONFIG_REISER4_FS and build (and install) your kernel. Reboot, and don't forget to report bugs if things go wrong. Even more important: don't forget your backups before messing with your filesystems!

To create/check/debug Reiser4 filesystems, you'll need the reiser4progs.


Since reiserfs is in mainline, just enable the following options in your kernel .config:


Todays distributions should have this options enabled already, no need to build your kernel. However, not every Linux distribution supports reiserfs. But if you disregard your distribution's recommended settings, you'll probably know what you're doing anyway.

To create/check/debug/resize ReiserFS filesystems, you'll need the reiserfsprogs.

Booting off a ReiserFS/Reiser4 partition

Booting off a ReiserFS/Reiser4 partition: what we mean here is that the kernel (usually a file in /boot) is actually located on a ReiserFS/Reiser4 partition. If you have a separate partition for /boot (e.g. a (readonly-mounted) ext2 partition at the beginning of your disk) and your root-filesystem is on a ReiserFS/Reiser4 partition, you only need to make sure that ReiserFS/Reiser4 support is enabled in your kernel - but that's true for every filesystem and has nothing to to with the bootloader.

As far as the writer is informed, booting off a ReiserFS partition is fully supported by LiLo or GRUB.

For Reiser4, LiLo is known to work out of the box. To install GRUB on a Reiser4 partition, a few more steps are needed.


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