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RESIZE2FS(8)                                                      RESIZE2FS(8)



NAME
       resize2fs - ext2/ext3/ext4 file system resizer

SYNOPSIS
       resize2fs [ -fFpPM ] [ -d debug-flags ] [ -S RAID-stride ] device [ size ]

DESCRIPTION
       The  resize2fs  program  will  resize ext2, ext3, or ext4 file systems.  It can be used to enlarge or shrink an
       unmounted file system located on device.  If the filesystem is mounted, it can be used to expand  the  size  of
       the mounted filesystem, assuming the kernel supports on-line resizing.  (As of this writing, the Linux 2.6 ker-
       nel supports on-line resize for filesystems mounted using ext3 and ext4.).

       The size parameter specifies the requested new size of the filesystem.  If no units are specified, the units of
       the  size parameter shall be the filesystem blocksize of the filesystem.  Optionally, the size parameter may be
       suffixed by one of the following the units designators: 's', 'K', 'M', or 'G', for 512 byte sectors, kilobytes,
       megabytes,  or  gigabytes,  respectively.   The size of the filesystem may never be larger than the size of the
       partition.  If size parameter is not specified, it will default to the size of the partition.

       The resize2fs program does not manipulate the size of partitions.  If you wish to  enlarge  a  filesystem,  you
       must  make  sure you can expand the size of the underlying partition first.  This can be done using fdisk(8) by
       deleting the partition and recreating it with a larger size or using lvextend(8), if you're using  the  logical
       volume  manager  lvm(8).   When  recreating  the partition, make sure you 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.  After running fdisk(8), run resize2fs to resize the ext2 filesystem to use all of the space in the
       newly enlarged partition.

       If you wish to shrink an ext2 partition, first use resize2fs to shrink the size of filesystem.   Then  you  may
       use  fdisk(8)  to shrink the size of the partition.  When shrinking the size of the partition, make sure you do
       not make it smaller than the new size of the ext2 filesystem!

OPTIONS
       -d debug-flags
              Turns on various resize2fs debugging features, if they have been compiled into the binary.   debug-flags
              should be computed by adding the numbers of the desired features from the following list:
                   2    - Debug block relocations
                   4    - Debug inode relocations
                   8    - Debug moving the inode table

       -f     Forces  resize2fs  to  proceed with the filesystem resize operation, overriding some safety checks which
              resize2fs normally enforces.

       -F     Flush the filesystem device's buffer caches before beginning.  Only really useful  for  doing  resize2fs
              time trials.

       -M     Shrink the filesystem to the minimum size.

       -p     Prints out a percentage completion bars for each resize2fs operation, so that the user can keep track of
              what the program is doing.

       -P     Print the minimum size of the filesystem and exit.

       -S RAID-stride
              The resize2fs program will heuristically determine the RAID stride that was specified when the  filesys-
              tem  was created.  This option allows the user to explicitly specify a RAID stride setting to be used by
              resize2fs instead.

KNOWN BUGS
       The minimum size of the filesystem as estimated by resize2fs may be incorrect, especially for filesystems  with
       1k and 2k blocksizes.

AUTHOR
       resize2fs was written by Theodore Ts'o <tytsoATmit.edu>.

COPYRIGHT
       Resize2fs  is  Copyright  1998  by  Theodore Ts'o and PowerQuest, Inc.  All rights reserved.  As of April, 2000
       Resize2fs may be redistributed under the terms of the GPL.

SEE ALSO
       fdisk(8), e2fsck(8), mke2fs(8), lvm(8), lvextend(8)



E2fsprogs version 1.41.12          May 2010                       RESIZE2FS(8)