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       ntfsresize - resize an NTFS filesystem without data loss


       ntfsresize [OPTIONS] --info DEVICE
       ntfsresize [OPTIONS] [--size SIZE[k|M|G]] DEVICE


       The  ntfsresize program safely resizes Windows XP, Windows Server 2003,
       Windows 2000, Windows NT4 and Longhorn NTFS  filesystems  without  data
       loss.  All  NTFS  versions  are  supported,  used  by 32-bit and 64-bit
       Windows.  Defragmentation is NOT required prior to resizing because the
       program   can  relocate  any  data  if  needed,  without  risking  data

       Ntfsresize 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

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

       To  resize  a  filesystem  on  a  partition,  you  must resize BOTH the
       filesystem and the partition by editing  the  partition  table  on  the
       disk.  Similarly  to other command line filesystem resizers, ntfsresize
       doesn’t manipulate the size of the partitions, hence  to  do  that  you
       must  use  a  disk  partitioning  tool  as  well, for example fdisk(8).
       Alternatively you could use one of the many user friendly  partitioners
       that  uses  ntfsresize internally, like Mandriva’s DiskDrake, QTParted,
       SUSE/Novell’s YaST Partitioner, IBM’s EVMS, GParted or  Debian/Ubuntu’s

       IMPORTANT!   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).   Don’t  forget  to save the
       partition table as well!

       If you wish to shrink an NTFS partition, first use ntfsresize to shrink
       the  size  of the filesystem. Then you could use fdisk(8) to shrink the
       size of the partition by deleting the partition and recreating it  with
       the  smaller size.  Do not make the partition smaller than the new size
       of  NTFS  otherwise  you  won’t  be  able  to  boot.  If  you  did   so
       notwithstanding  then  just  recreate  the  partition to be as large as

       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 at the same starting sector and with the same partition
       type as before.  Otherwise you won’t be able to access your filesystem.
       Use  the  ’u’  fdisk command to switch to the reliable sector unit from
       the default cylinder one.

       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.   Nearly
       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.
       -fv is equivalent to -f -v.  Long named options can be  abbreviated  to
       any unique prefix of their name.

       -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.
              Ntfsresize 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
              partition 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  even  if
              the filesystem is marked for consistency check.

              Please   note,   ntfsresize  always  marks  the  filesystem  for
              consistency check 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
              displays what it would do if it were to resize  the  filesystem.
              Continue with the real resizing only if the test run passed.

       -b, --bad-sectors
              Support  disks  having  hardware  errors, bad sectors with those
              ntfsresize would refuse to work by default.

              Prior using this option, it’s strongly  recommended  to  make  a
              backup  by  ntfsclone(8) using the --rescue option, then running
              ’chkdsk /f /r volume:’ on Windows from the command line. If  the
              disk  guarantee  is still valid then replace it.  It’s defected.
              Please also note, that no software  can  repair  these  type  of
              hardware errors. The most what they can do is to work around the
              permanent defects.

              This option doesn’t have any effect if the disk is flawless.

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

       -v, --verbose
              More output.

       -V, --version
              Print the version number of ntfsresize and exit.

       -h, --help
              Display help and exit.


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


       No reliability problem is known.  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 the development team:

       There are a few very rarely met restrictions  at  present:  filesystems
       having  unknown  bad  sectors,  relocation  of the first MFT extent and
       resizing into the middle of a $MFTMirr  extent  aren’t  supported  yet.
       These  cases  are detected and resizing is restricted to a safe size or
       the closest safe size is displayed.

       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 and no need to worry about it.  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

       The disk geometry handling semantic (HDIO_GETGEO ioctl) has changed  in
       an   incompatible   way   in  Linux  2.6  kernels  and  this  triggered
       multitudinous  partition  table  corruptions  resulting  in  unbootable
       Windows systems, even if NTFS was consistent, if parted(8) was involved
       in some way. This problem was often attributed  to  ntfsresize  but  in
       fact  it’s  completely  independent  of  NTFS thus ntfsresize. Moreover
       ntfsresize never touches the partition table at all.  By  changing  the
       ’Disk Access Mode’ to LBA in the BIOS makes booting work again, most of
       the time. You can  find  more  information  about  this  issue  in  the
       Troubleshooting section of the below referred Ntfsresize FAQ.


       ntfsresize  was written by Szabolcs Szakacsits, with contributions from
       Anton Altaparmakov and Richard Russon.


       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 the
       relocation support, to Florian Eyben, Fritz Oppliger,  Richard  Ebling,
       Sid-Ahmed  Touati,  Jan  Kiszka, Benjamin Redelings, Christopher Haney,
       Ryan Durk,  Ralf  Beyer,  Scott  Hansen,  Alan  Evans  for  the  valued
       contributions   and  to  Theodore  Ts’o  whose  resize2fs(8)  man  page
       originally formed the basis of this page.


       ntfsresize is part of the ntfsprogs package and is available from:

       The manual pages are available online at:

       Ntfsresize related news, example of usage, troubleshooting,  statically
       linked binary and FAQ (frequently asked questions) are maintained at:


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