ntfstruncate man page

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 :

HexDecimalName
0x1016"$STANDARD_INFORMATION"
0x2032"$ATTRIBUTE_LIST"
0x3048"$FILE_NAME"
0x4064"$OBJECT_ID"
0x5080"$SECURITY_DESCRIPTOR"
0x6096"$VOLUME_NAME"
0x70112"$VOLUME_INFORMATION"
0x80128"$DATA"
0x90144"$INDEX_ROOT"
0xA0160"$INDEX_ALLOCATION"
0xB0176"$BITMAP"
0xC0192"$REPARSE_POINT"
0xD0208"$EA_INFORMATION"
0xE0224"$EA"
0xF0240"$PROPERTY_SET"
0x100256"$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:
http://www.tuxera.com/community/

See Also

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

Referenced By

ntfsfallocate(8), ntfsprogs(8).

June 2014 ntfs-3g 2016.2.22