.\" -*- nroff -*-
.\" Copyright 1996-2003 Hans Reiser.
.\" 
.TH DEBUGREISERFS 8 "April 2003" "Reiserfsprogs 3.6.9"
.SH NAME
debugreiserfs
.SH SYNOPSIS
.B debugreiserfs
[
.B -dDJmoqpS
] [
.B -j \fIdevice
] [
.B -B \fIblocknumber
]

.\" ] [
.\" .B -s
.\" ] [
.I device
.SH DESCRIPTION
It helps sometimes to solve problems with reiserfs filesystems. Being
called without options it prints super block of reiserfs filesystem found
on the \fIdevice\fR.
.TP
.I device
is the special file corresponding to the device (e.g /dev/hdXX for
IDE disk partition or /dev/sdXX for SCSI disk partition).
.SH OPTIONS
.TP
\fB-j\fR \fIdevice\fR
print contents of journal. Also with the option -p it allows to pack
journal into archive with other metadata  
.TP
\fB-J\fR
print journal header.
.TP
.B -d
print formatted nodes of the internal tree of the filesystem
.TP
.B -D
print formatted nodes of all used blocks of the filesystem
.TP
.B -m
print contents of bitmap (not very useful)
.TP
.B -o
print objectid map (not very useful)
.TP
\fB-1\fR \fIblocknumber\fR
print specified block of the filesystem
.TP
.\" \fB-s
.\" scans the partition and prints a line when any kind of reiserfs
.\" formatted nodes found. Can be used to find specific key in the filesystem.
.\" .TP
.B -p
Makes \fBdebugreiserfs\fR to find filesystem metadata This option
exists to help reiserfsck debugging. If reiserfsck fails - you may
extract filesystem metadata with \fBdebugreiserfs\fR -p
/dev/xxx |gzip -c > xxx.gz. We download that data and make the
filesystem similar to your with gunzip -c xxx.gz | unpack /dev/xxx
(unpack is included into reiserfsprogs package). This usually allows
to reproduce and debug the problem quickly. When data file is not too
large.
.TP
.B -S 
When -S is not specified -p 
.\" and -s 
deals with blocks marked used in the
filesystem bitmap. With this option set they will work with whole
device.
.TP
.B -q
Suppress showing speed of progress when 
.\" -s or 
-p is in use
.SH AUTHOR
This version of \fBdebugreiserfs\fR has been written by Hans Reiser <reiser@namesys.com>.
.SH BUGS
There are probably few of them. Please, report bugs to ReiserFS mail-list <reiserfs-list@namesys.com>.
.SH SEE ALSO
.BR reiserfsck (8),
.BR mkreiserfs (8)