ntfstruncate - truncate a file on an NTFS volume
ntfstruncate [
options]
device file [attr-type
[
attr-name]]
new-length
ntfstruncate truncates (or extends) a specified attribute belonging to a
file or directory, to a specified length.
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.
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
There are no known problems with
ntfstruncate. If you find a bug, please
send an email describing the problem to the development team:
[email protected]
ntfstruncate was written by Anton Altaparmakov.
ntfstruncate is part of the
ntfs-3g package and is available from:
https://github.com/tuxera/ntfs-3g/wiki/
ntfs-3g(8),
ntfsfallocate(8),
ntfsprogs(8).