---
name: "debugreiserfs"
section: "8"
platform: "linux"
package: "reiserfsprogs"
version: "1:3.6.27-9"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/debugreiserfs"
---

# debugreiserfs(8)

The debugging tool for the ReiserFS filesystem.

## NAME

debugreiserfs - The debugging tool for the ReiserFS filesystem.

## SYNOPSIS

**debugreiserfs** \[ **-dDJmoqpuSV** \] \[ **-j *device*** \] \[ **-B *file*** \] \[ **-1 *N*** \]

*device*

## DESCRIPTION

**debugreiserfs** sometimes helps to solve problems with reiserfs filesystems.  When run without options it prints the super block of the ReiserFS filesystem found on the *device*.

- *device*

  is the special file corresponding to the device (e.g /dev/hdXX for an IDE disk partition or /dev/sdXX for a SCSI disk partition).

## OPTIONS

- **-j** *device*

  prints the contents of the journal. The option -p allows it to pack the journal  with other metadata into the archive.

- **-J**

  prints the journal header.

- **-d**

  prints the formatted nodes of the internal tree of the filesystem.

- **-D**

  prints the formatted nodes of all used blocks of the filesystem.

- **-m**

  prints the contents of the bitmap (slightly useful).

- **-o**

  prints the objectid map (slightly useful).

- **-B** *file*

  takes the list of bad blocks stored in the internal ReiserFS tree and translates it  into an ascii list written to the specified file.

- **-1** *blocknumber*

  prints the specified block of the filesystem.

- **-p**

  extracts the filesystem's metadata with **debugreiserfs** -p /dev/xxx \| gzip -c \>  xxx.gz. None of your data are packed unless a filesystem corruption presents when  the whole block having this corruption is packed. You send us the output, and we use  it to create a filesystem with the same strucure as yours using **debugreiserfs -u**. When the data file is not too large, this usually allows us to quickly reproduce  and debug the problem.

- **-u**

  builds the ReiserFS filesystem image with gunzip -c xxx.gz \| **debugreiserfs**  -u /dev/image of the previously packed metadata with **debugreiserfs -p**. The result image is not the same as the original filesystem, because mostly only metadata were packed with **debugreiserfs -p**, but the filesystem structure is completely  recreated.

- **-S**

  When -S is not specified -p  deals with blocks marked used in the filesystem bitmap only. With this option  set **debugreiserfs** will work with the entire device.

- **-q**

  When  -p is in use, suppress showing the speed of progress.

## AUTHOR

This version of **debugreiserfs** has been written by Vitaly Fertman  \<vitaly@namesys.com\>.

## BUGS

Please report bugs to the ReiserFS developers \<reiserfs-devel@vger.kernel.org\>, providing as much information as possible--your hardware, kernel, patches, settings, all printed messages; check the syslog file for any related information.

## SEE ALSO

[**reiserfsck**(8)](/reiserfsck/8.md), [**mkreiserfs**(8)](/mkreiserfs/8.md)