Man Linux: Main Page and Category List


       resize2fs - ext2/ext3/ext4 file system resizer


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


       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 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 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!


       -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
                   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  offline
              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 created.  This
              option allows the user  to  explicitly  specify  a  RAID  stride
              setting to be used by resize2fs instead.


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


       resize2fs was written by Theodore Ts'o <>.


       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.


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