# DEBUGREISERFS

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
AUTHOR
BUGS
SEE ALSO

## 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-dev@namesys.com>, 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), mkreiserfs(8)