resize_reiserfs - Reiserfs filesystem resizer
SYNOPSIS
resize_reiserfs [ -s [+|-]size[K|M|G] ] [ -fqv ] device
DESCRIPTION
The resize_reiserfs tool resizes an unmounted reiserfs
file system. It enlarges or shrinks an reiserfs file sys
tem located on a device so that it will have size bytes or
size=old_size +(-) size bytes if the + or - prefix is
used. If the -s option is not specified, the filesystem
will be resized to fill the given device. The size param
eter may have one of the optional modifiers K, M, G, which
means the size parameter is given in kilo-, mega-, giga
bytes respectively.
The resize_reiserfs program does not manipulate the size
of the device. If you wish to enlarge a filesystem, you
must make sure you expand the underlying device first.
This can be done using cfdisk(8) for partitions, by delet
ing the partition and recreating it with a larger size
(assuming there is free space after the partition in ques
tion). Make sure you re-create it with the same starting
disk cylinder as before! Otherwise, the resize operation
will certainly not work, and you may lose your entire
filesystem.
The resize_reiserfs program allows to grow a reiserfs on-
line if there is a free space on block device.
If you wish to shrink an reiserfs partition, first use
resize_reiserfs to shrink the file system. You may then
use cfdisk(8) to shrink the device. When shrinking the
size of the device, make sure you do not make it smaller
than the reduced size of the reiserfs filesystem.
OPTIONS
-s [+|-]size
Set the new size in bytes.
-f Force, do not perform checks.
-q Do not print anything but error messages.
-v Turn on extra progress status messages (default).
RETURN VALUES
0 Resizing successful.
EXAMPLES
The following example shows how to test resize_reiserfs.
Suppose 2Gb reiserfs filesystem is created on the device
/dev/hda8 and is mounted on /mnt. For shrinking the
device we need to unmount it first, then run resize_reis
erfs with a size parameter (in this case -1Gb):
df
umount /mnt
resize_reiserfs -s -1G /dev/hda8
mount /dev/hda8 /mnt
df /mnt
WARNING
Note that this is a BETA program and may corrupt filesys
tems.
AUTHOR
This version of resize_reiserfs has been written by
Alexander Zarochentcev <zam@namesys.com>.
BUGS
Please, report about the bugs to Alexander Zarochentcev
<zam@namesys.com> or to Hans Reiser <reiser@namesys.com>.
SEE ALSO
cfsck(8), debugreiserfs(8)
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