Imported reiserfsprogs-3.6.20
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.\" -*- nroff -*-
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.\" Copyright 1996-2004 Hans Reiser.
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.\"
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.TH RESIZE_REISERFS 8 "January 2004" "Reiserfsprogs-3.6.19"
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.SH NAME
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resize_reiserfs \- resizer tool for the ReiserFS filesystem
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.SH SYNOPSIS
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.BR resize_reiserfs
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[
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.B \-s
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.IR \fR[\fB+\fR|\fB\- ]\fIsize\fB[\fBK\fR|\fBM\fR|\fBG\fR]
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] [
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.B \-j
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.IR \fR\fIdev
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] [
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.B \-fqv
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]
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.I device
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.SH DESCRIPTION
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The
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.B resize_reiserfs
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tool resizes an unmounted reiserfs file system. It enlarges or shrinks an
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reiserfs file system located on a
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.I device
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so that it will have
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.I size
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bytes or size=old_size +(\-)
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.I size
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bytes if the + or \- prefix is used.
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If the
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.B \-s
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option is not specified, the filesystem will be resized to fill the
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given device.
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The
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.I size
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parameter may have one of the optional modifiers
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.BR K ", " M ", " G ,
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which means the
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.I size
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parameter is given in kilo\-, mega\-, gigabytes respectively.
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.PP
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The
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.B resize_reiserfs
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program does not manipulate the size of the device. If you wish to
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enlarge a filesystem, you must make sure you expand the underlying
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device first. This can be done using
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.BR cfdisk (8)
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for partitions, by deleting the partition and recreating it with a
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larger size (assuming there is free space
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.I after
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the partition in question). Make sure you re\-create it with the
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same starting disk cylinder as before! Otherwise, the resize operation
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will certainly not work, and you may lose your entire filesystem.
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.PP
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The
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.B resize_reiserfs
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program allows to grow a reiserfs on-line if there is a free
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space on block
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.I device.
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.PP
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If you wish to shrink a reiserfs partition, first use
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.B resize_reiserfs
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to shrink the file system. You may then use
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.BR cfdisk (8)
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to shrink the device. When shrinking the size of the device, make sure
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you do not make it smaller than the reduced size of the reiserfs filesystem.
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.SH OPTIONS
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.TP
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.BR \-s\ [+|\-]\fIsize
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Set the new size in bytes.
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.TP
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.BR \-j\ \fIdev
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Set the journal device name.
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.TP
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.BR \-f
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Force, do not perform checks.
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.TP
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.BR \-q
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Do not print anything but error messages.
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.TP
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.BR \-v
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Turn on extra progress status messages (default).
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.SH RETURN VALUES
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0 Resizing successful.
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.TP
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\-1 Resizing not successful.
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.SH EXAMPLES
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The following example shows how to test
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.B resize_reiserfs\fR.
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Suppose 2Gb reiserfs filesystem is created on the device /dev/hda8
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and is mounted on /mnt.
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For shrinking the device we need to unmount it first, then run
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.B resize_reiserfs
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with a
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.I size \fR parameter (in this case -1Gb):
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.PP
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\ df
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.br
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\ umount /mnt
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.br
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\ resize_reiserfs -s -1G /dev/hda8
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.br
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\ mount /dev/hda8 /mnt
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.br
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\ df /mnt
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.SH AUTHOR
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This version of
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.B resize_reiserfs
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has been written by Alexander Zarochentcev <zam@namesys.com>.
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.SH BUGS
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Please report bugs to the ReiserFS developers <reiserfs-dev@namesys.com>, providing
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as much information as possible--your hardware, kernel, patches, settings, all printed
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messages; check the syslog file for any related information.
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.SH SEE ALSO
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.BR cfdisk (8),
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.BR reiserfsck (8),
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.BR debugreiserfs (8)
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