resize_reiserfs - Reiserfs filesystem resizer
resize_reiserfs [ -s [+|-]size[K|M|G] ] [ -j dev ] [ -fqv ] device
The resize_reiserfs tool resizes an unmounted reiserfs file system. It enlarges or
shrinks an reiserfs file system 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 spec-
ified, the filesystem will be resized to fill the given device. The size parameter may
have one of the optional modifiers K, M, G, which means the size parameter is given in
kilo-, mega-, gigabytes 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 deleting the partition and recreating it with a
larger size (assuming there is free space after the partition in question). Make sure you
re-create it with the same starting disk cylinder as before! Otherwise, the resize opera-
tion 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
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
Set the new size in bytes.
-j dev Set the journal device name.
-f Force, do not perform checks.
-q Do not print anything but error messages.
-v Turn on extra progress status messages (default).
0 Resizing successful.
-1 In another case.
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_reiserfs with a size parameter (in this case
resize_reiserfs -s -1G /dev/hda8
mount /dev/hda8 /mnt
Note that this is a BETA program and may corrupt filesystems.
This version of resize_reiserfs has been written by Alexander Zarochentcev
Please, report about the bugs to Alexander Zarochentcev <firstname.lastname@example.org> or to Hans
cfdisk(8), reiserfsck(8), debugreiserfs(8)
Reiserfsprogs-3.6.4 January 2002 RESIZE_REISERFS(8)