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 op-
tions, that don't take an argument, can be combined into a single com-
mand, e.g. -fv is equivalent to -f -v. Long named options can be ab-
breviated 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 ap-
pended 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)
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