Manual: 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 argu‐
       ment, 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  $DATA	 at‐
	      tribute  (the  contents  of  a plain file) will be truncated. The attribute has to be specified by a number in
	      decimal or hexadecimal :
	      ┌────────────────────────────────────────────┐
	      │ Hex	Decimal	  Name			   │
	      │ 0x10	16	  "$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/

SEE ALSO
       ntfs-3g(8), ntfsfallocate(8), ntfsprogs(8).

ntfs-3g 2022.10.3					  June 2014					     NTFSTRUNCATE(8)