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NTFSRESIZE(8)               System Manager's Manual              NTFSRESIZE(8)

       ntfsresize - resize an NTFS filesystem without data loss

       ntfsresize [OPTIONS] --info device
       ntfsresize [OPTIONS] [--size size[k|M|G]] device

       The  ntfsresize  program non-destructively resizes Windows XP/2000/NT4,
       Windows Server 2003 or Longhorn Beta NTFS filesystems. It can  be  used
       to shrink or enlarge any NTFS filesystem located on an unmounted device
       (usually a disk partition). The new filesystem will  have  size  bytes.
       The  size  parameter  may  have  one of the optional modifiers k, M, G,
       which means the size parameter is given in kilo-,  mega-  or  gigabytes
       respectively.   ntfsresize  conforms to the SI, ATA, IEEE standards and
       the disk manufacturers by using k=10^3, M=10^6 and G=10^9.

       If both --info and --size are omitted then the NTFS filesystem will  be
       enlarged to the underlying device size.

       The  ntfsresize  program doesn't manipulate the size of partitions.  To
       do that you have to use a disk partitioning tool, for example fdisk(8).

       IMPORTANT!  Generally it's a good practice making  regular  backups  of
       your  valuable data, especially before using any partitioning tools. To
       do so for NTFS, you could use ntfsclone(8).  It's also included in  the
       ntfsprogs(8) package.

       If you wish to shrink an NTFS partition, first use ntfsresize to shrink
       the size of the filesystem. Then you may use  fdisk(8)  to  shrink  the
       size  of the partition by deleting the partition and recreating it with
       the smaller size.  But be careful, do not make  the  partition  smaller
       than the new size of the NTFS filesystem otherwise you won't be able to
       boot and you might lose your data.

       To enlarge an NTFS filesystem, first you must enlarge the size  of  the
       underlying  partition.  This can be done using fdisk(8) by deleting the
       partition and recreating it with a larger size.  Make sure it will  not
       overlap with an other existing partition.  Then  you may use ntfsresize
       to enlarge the size of the filesystem.

       When recreating the partition by a disk partitioning  tool,  make  sure
       you  create it with the same starting disk cylinder (sector) and parti-
       tion type as before.  Otherwise you may lose your entire filesystem.

       Also make sure you set the  bootable  flag  for  the  partition  if  it
       existed  before.  Failing  to  do so you might not be able to boot your
       computer from the disk.

       Below is a summary of all the  options  that  ntfsresize  accepts.  All
       options  have two equivalent names. The short name is preceded by - and
       the long name is preceded by --.  Any single letter options, that don't
       take  an  argument, can be combined into a single command, e.g.  -fi is
       equivalent to -f -i.

       -i, --info
              By using this option ntfsresize will determine the theoretically
              smallest  shrunken  filesystem  size supported. Most of the time
              the result is the space already used on the filesystem.  Ntfsre-
              size  will  refuse shrinking to a smaller size than what you got
              by this option and depending on  several  factors  it  might  be
              unable  to  shrink very close to this theoretical size. Although
              the integrity of your data should be never in risk,  it's  still
              strongly recommended to make a test run by using the --no-action
              option before real resizing.

              Practically the smallest shrunken size generally  is  at  around
              "used  space"  + (20-200 MB). Please also take into account that
              Windows might need about 50-100  MB  free  space  left  to  boot

              This option never causes any changes to the filesystem, the par-
              tition is opened read-only.

       -s, --size size[k|M|G]
              Resize filesystem to size[k|M|G] bytes.  The optional  modifiers
              k,  M,  G  mean  the  size parameter is given in kilo-, mega- or
              gigabytes respectively.  Conforming to standards, k=10^3, M=10^6
              and G=10^9. Use this option with --no-action first.

       -f, --force
              Forces  ntfsresize  to  proceed with the resize operation if the
              filesystem is marked "dirty" for consistency check.

              Please note, ntfsresize  always  marks  the  filesystem  "dirty"
              before  a real resize operation and it leaves that way for extra
              safety. Thus if NTFS was marked by ntfsresize then it's safe  to
              use  this  option.  If  you need to resize several times without
              booting into Windows between each resizing steps then  you  must
              use this option.

       -n, --no-action
              Use  this option to make a test run before doing the real resize
              operation.  Volume will be opened read-only and ntfsresize  dis-
              plays  what  it  would  do  if it were to resize the filesystem.
              Continue with the real resizing only if the test run passed.

       -P, --no-progress-bar
              Don't show progress bars.

       -v, --verbose
              More output.

       -h, --help
              Display help and exit.

       The exit code is 0 on success, non-zero otherwise.

       No reliability problems are known or has been  reported.  If  you  need
       help  please  try the ntfsresize FAQ first (see below) and if you don't
       find your answer then send your question,  comment  or  bug  report  to
       <linux-ntfs-devATlists.net>.   No subscription is needed but
       the mailing list is moderated and it can take some time to approve your

       There are some very rarely met limitations at present: filesystems hav-
       ing bad sectors, highly fragmented Master File Table (MFT),  relocation
       of  the first MFT extent and resizing in the middle of some metadata in
       some cases aren't supported yet. These cases are detected and  resizing
       is  refused, restricted to a safe size or the closest safe size is dis-

       ntfsresize schedules an NTFS consistency check and after the first boot
       into  Windows you must see chkdsk running on a blue background. This is
       intentional.  Windows may force a quick reboot  after  the  consistency
       check.   Moreover  after  repartitioning your disk and depending on the
       hardware configuration, the Windows message System Settings Change  may
       also appear. Just acknowledge it and reboot again.

       ntfsresize has been written by Szabolcs Szakacsits <szakaATsienet.hu>.

       Many  thanks  to Anton Altaparmakov and Richard Russon for libntfs, the
       excellent documentation and comments, to  Gergely  Madarasz,  Dewey  M.
       Sasser  and  Miguel  Lastra  and  his  colleagues  at the University of
       Granada for their continuous and highly valuable help,  furthermore  to
       Erik Meade, Martin Fick, Sandro Hawke, Dave Croal, Lorrin Nelson, Geert
       Hendrickx, Robert Bjorkman and Richard Burdick for beta testing and  to
       Theodore  Ts'o  whose  resize2fs(8)  man  page formed the basis of this

       ntfsresize is part of the ntfsprogs(8) package and  is  available  from
       http://linux-ntfs.sourceforge.net/  as  source  and precompiled binary.
       ntfsresize related news, example of usage, troubleshooting,  statically
       linked binary and FAQ (frequently asked questions) is maintained at

       fdisk(8),  cfdisk(8),  sfdisk(8),  parted(8),  mkntfs(8), ntfsclone(8),

ntfsprogs version 1.9.4            Mar 2004                      NTFSRESIZE(8)