ntfstruncate

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

NAME

   ntfstruncate - truncate a file on an NTFS volume

SYNOPSIS

   ntfstruncate [options] device file [attr-type [attr-name]] new-length

DESCRIPTION

   ntfstruncate truncates (or extends) a specified attribute belonging to a file or directory, to a specified length.

OPTIONS

   Below  is  a summary of all the options that ntfstruncate 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.

   -f, --force
          This will override some sensible defaults, such as not using a mounted volume.  Use this option with caution.

   -h, --help
          Show a list of options with a brief description of each one.

   -l     Display licensing information.

   -n, --no-action
          Simulate the truncation without actually write to device.

   -q, --quiet
          Suppress some debug/warning/error messages.

   -v, --verbose
          Display more debug/warning/error messages.

   -V, --version
          Show the version number, copyright and license of ntfstruncate.

   attr-type
          Define a particular attribute type to be truncated (advanced use only).  By default, the unnamed $DATA attribute (the contents of a plain file) will be truncated. The attribute
          has to be specified by a number in decimal or hexadecimal :
          ┌────────────────────────────────────────────┐
          │ Hex     Decimal   Name                     │
          │ 0x10    16        "$STANDARD_INFORMATION"  │
          │ 0x20    32        "$ATTRIBUTE_LIST"        │
          │ 0x30    48        "$FILE_NAME"             │
          │ 0x40    64        "$OBJECT_ID"             │
          │ 0x50    80        "$SECURITY_DESCRIPTOR"   │
          │ 0x60    96        "$VOLUME_NAME"           │
          │ 0x70    112       "$VOLUME_INFORMATION"    │
          │ 0x80    128       "$DATA"                  │
          │ 0x90    144       "$INDEX_ROOT"            │
          │ 0xA0    160       "$INDEX_ALLOCATION"      │
          │ 0xB0    176       "$BITMAP"                │
          │ 0xC0    192       "$REPARSE_POINT"         │
          │ 0xD0    208       "$EA_INFORMATION"        │
          │ 0xE0    224       "$EA"                    │
          │ 0xF0    240       "$PROPERTY_SET"          │
          │ 0x100   256       "$LOGGED_UTILITY_STREAM" │
          └────────────────────────────────────────────┘

   attr-name
          Define the name of the particular attribute type to be truncated (advanced use only).

   new-length
          Specify  the  target size of the file.  It will be rounded up to a multiple of the cluster size.  A suffix of K, M, G, T, P or E may be appended to mean a multiplicative factor
          of a power of 1000. Similarly a suffix of Ki, Mi, Gi, Ti, Pi or Ei may be appended to mean a multiplicative factor of a power of 1024.

EXAMPLES

   Resize to 100MB the file database.db located in the Data directory which is at the root of an NTFS file system.

          ntfstruncate /dev/sda1 Data/database.db 100M

BUGS

   There are no known problems with ntfstruncate.  If you find a bug, please send an email describing the problem to the development team:
   ntfs-3g-devel@lists.sf.net

AUTHORS

   ntfstruncate was written by Anton Altaparmakov.

AVAILABILITY

   ntfstruncate is part of the ntfs-3g package and is available from:
   https://github.com/tuxera/ntfs-3g/wiki/