ntfstruncate Man page

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 pre‐
ceded 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 speci‐
fied 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:

Community

SEE ALSO

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

ntfs-3g 2015.3.14AR.1 June 2014 NTFSTRUNCATE(8)