1NTFSTRUNCATE(8) System Manager's Manual NTFSTRUNCATE(8)
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6 ntfstruncate - truncate a file on an NTFS volume
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9 ntfstruncate [options] device file [attr-type [attr-name]] new-length
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12 ntfstruncate truncates (or extends) a specified attribute belonging to
13 a file or directory, to a specified length.
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16 Below is a summary of all the options that ntfstruncate accepts.
17 Nearly all options have two equivalent names. The short name is pre‐
18 ceded by - and the long name is preceded by --. Any single letter op‐
19 tions, that don't take an argument, can be combined into a single com‐
20 mand, e.g. -fv is equivalent to -f -v. Long named options can be ab‐
21 breviated to any unique prefix of their name.
22 -f, --force
24 This will override some sensible defaults, such as not using a
25 mounted volume. Use this option with caution.
26 -h, --help
28 Show a list of options with a brief description of each one.
29 -l Display licensing information.
31 -n, --no-action
33 Simulate the truncation without actually write to device.
34 -q, --quiet
36 Suppress some debug/warning/error messages.
37 -v, --verbose
39 Display more debug/warning/error messages.
40 -V, --version
42 Show the version number, copyright and license of ntfstruncate.
43 attr-type
45 Define a particular attribute type to be truncated (advanced use
46 only). By default, the unnamed $DATA attribute (the contents of
47 a plain file) will be truncated. The attribute has to be speci‐
48 fied by a number in decimal or hexadecimal :
49 ┌───────────────────────────────────────────┐
51 │Hex Decimal Name │
52 │0x10 16 "$STANDARD_INFORMATION" │
53 │0x20 32 "$ATTRIBUTE_LIST" │
54 │0x30 48 "$FILE_NAME" │
55 │0x40 64 "$OBJECT_ID" │
56 │0x50 80 "$SECURITY_DESCRIPTOR" │
57 │0x60 96 "$VOLUME_NAME" │
58 │0x70 112 "$VOLUME_INFORMATION" │
59 │0x80 128 "$DATA" │
60 │0x90 144 "$INDEX_ROOT" │
61 │0xA0 160 "$INDEX_ALLOCATION" │
62 │0xB0 176 "$BITMAP" │
63 │0xC0 192 "$REPARSE_POINT" │
64 │0xD0 208 "$EA_INFORMATION" │
65 │0xE0 224 "$EA" │
66 │0xF0 240 "$PROPERTY_SET" │
67 │0x100 256 "$LOGGED_UTILITY_STREAM" │
68 └───────────────────────────────────────────┘
69 attr-name
71 Define the name of the particular attribute type to be truncated
72 (advanced use only).
73 new-length
76 Specify the target size of the file. It will be rounded up to a
77 multiple of the cluster size. A suffix of K, M, G, T, P or E
78 may be appended to mean a multiplicative factor of a power of
79 1000. Similarly a suffix of Ki, Mi, Gi, Ti, Pi or Ei may be ap‐
80 pended to mean a multiplicative factor of a power of 1024.
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83 Resize to 100MB the file database.db located in the Data directory
84 which is at the root of an NTFS file system.
85 ntfstruncate /dev/sda1 Data/database.db 100M
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90 There are no known problems with ntfstruncate. If you find a bug,
91 please send an email describing the problem to the development team:
92 ntfs-3g-devel@lists.sf.net
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95 ntfstruncate was written by Anton Altaparmakov.
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98 ntfstruncate is part of the ntfs-3g package and is available from:
99 https://github.com/tuxera/ntfs-3g/wiki/
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102 ntfs-3g(8), ntfsfallocate(8), ntfsprogs(8).
103ntfs-3g 2022.10.3 June 2014 NTFSTRUNCATE(8)