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  filesys-
       tem,  assuming  the  kernel supports on-line resizing.  (As of this writing, the Linux 2.6 kernel supports on-line resize
       for filesystems mounted using ext3 only.).

       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 parti-
       tion 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 filesystem was cre-
              ated.  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)