mirror of
https://git.code.sf.net/p/ntfs-3g/ntfs-3g.git
synced 2024-12-04 15:34:28 +08:00
138 lines
4.2 KiB
Groff
138 lines
4.2 KiB
Groff
|
.\" Copyright (c) 2014 Jean-Pierre Andre
|
||
|
|
.\" This file may be copied under the terms of the GNU Public License.
|
||
|
|
.\"
|
||
|
|
.TH NTFSFALLOCATE 8 "June 2014" "ntfs-3g @VERSION@"
|
||
|
|
.SH NAME
|
||
|
|
ntfsfallocate \- preallocate space to a file on an NTFS volume
|
||
|
|
.SH SYNOPSIS
|
||
|
|
\fBntfsfallocate\fR [\fIoptions\fR] -l \fIlength\fR \fIdevice\fR \fIfile\fR \fI[attr-type\fR [\fIattr-name\fR]]
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.B ntfsfallocate
|
||
|
|
preallocates space for any attribute of a file or directory, thus reserving
|
||
|
|
space before actual contents is written. This is similar to fallocate(1).
|
||
|
|
.SH OPTIONS
|
||
|
|
Below is a summary of all the options that
|
||
|
|
.B ntfsfallocate
|
||
|
|
accepts. Nearly all options have two equivalent names. The short name is
|
||
|
|
preceded by
|
||
|
|
.B \-
|
||
|
|
and the long name is preceded by
|
||
|
|
.BR \-\- .
|
||
|
|
Any single letter options, that don't take an argument, can be combined into a
|
||
|
|
single command, e.g.
|
||
|
|
.B \-fv
|
||
|
|
is equivalent to
|
||
|
|
.BR "\-f \-v" .
|
||
|
|
Long named options can be abbreviated to any unique prefix of their name.
|
||
|
|
.TP
|
||
|
|
\fB\-f\fR, \fB\-\-force\fR
|
||
|
|
This will override some sensible defaults, such as not using a mounted volume.
|
||
|
|
Use this option with caution.
|
||
|
|
.TP
|
||
|
|
\fB\-h\fR, \fB\-\-help\fR
|
||
|
|
Show a list of options with a brief description of each one.
|
||
|
|
.TP
|
||
|
|
\fB\-l\fR, \fB\-\-length\fR LENGTH
|
||
|
|
This is a mandatory option to specify the number of bytes to preallocate.
|
||
|
|
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.
|
||
|
|
.TP
|
||
|
|
\fB\-n\fR, \fB\-\-no-size-change\fR
|
||
|
|
Do not change the apparent size of the file. The space allocated beyond
|
||
|
|
the apparent size is not zeroed, but subsequent writing beyond the apparent
|
||
|
|
end of file will force zeroing the inner allocated space as it cannot be
|
||
|
|
considered as a hole any more, and this may take significant time.
|
||
|
|
.TP
|
||
|
|
\fB\-N\fR, \fB\-\-no-action\fR
|
||
|
|
Simulate the allocation without actually write to device.
|
||
|
|
.TP
|
||
|
|
\fB\-o\fR, \fB\-\-offset\fR OFFSET
|
||
|
|
Specify the offset in the file where preallocation starts. By default,
|
||
|
|
the preallocation is counted from the beginning of the file. Space already
|
||
|
|
allocated in the area defined by offset and length is preserved.
|
||
|
|
.TP
|
||
|
|
\fB\-q\fR, \fB\-\-quiet\fR
|
||
|
|
Suppress some debug/warning/error messages.
|
||
|
|
.TP
|
||
|
|
\fB\-v\fR, \fB\-\-verbose\fR
|
||
|
|
Display more debug/warning/error messages.
|
||
|
|
.TP
|
||
|
|
\fB\-V\fR, \fB\-\-version\fR
|
||
|
|
Show the version number, copyright and license of
|
||
|
|
.BR ntfsfallocate .
|
||
|
|
.TP
|
||
|
|
\fBattr-type\fR
|
||
|
|
Define a particular attribute type to be preallocated (advanced use only).
|
||
|
|
By default, the unnamed $DATA attribute (the contents of a plain file) will
|
||
|
|
be preallocated. The attribute has to be specified by a number in decimal
|
||
|
|
or hexadecimal :
|
||
|
|
.TS
|
||
|
|
box;
|
||
|
|
lB lB lB
|
||
|
|
l l l.
|
||
|
|
Hex Decimal Name
|
||
|
|
0x10 16 "$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"
|
||
|
|
.TE
|
||
|
|
.sp
|
||
|
|
.TP
|
||
|
|
\fBattr-name\fR
|
||
|
|
Define the name of the particular attribute type to be preallocated
|
||
|
|
(advanced use only).
|
||
|
|
.SH EXAMPLES
|
||
|
|
Preallocate 100MB to the file database.db located in the Data directory
|
||
|
|
which is at the root of an NTFS file system.
|
||
|
|
.RS
|
||
|
|
.sp
|
||
|
|
.B ntfsfallocate -l 100M /dev/sda1 Data/database.db
|
||
|
|
.sp
|
||
|
|
.RE
|
||
|
|
.SH BUGS
|
||
|
|
There are no known problems with
|
||
|
|
.BR ntfsfallocate ,
|
||
|
|
however it can lead to configurations not supported by Windows
|
||
|
|
and Windows may crash (BSOD) when writing to preallocated clusters
|
||
|
|
which were not written to earlier. Files with preallocated space should
|
||
|
|
be fully be written to before they are updated by Windows.
|
||
|
|
.P
|
||
|
|
If you find a bug in \fBntfsfallocate\fR proper, please send an email
|
||
|
|
describing the problem to the development team:
|
||
|
|
.br
|
||
|
|
.nh
|
||
|
|
ntfs\-3g\-devel@lists.sf.net
|
||
|
|
.hy
|
||
|
|
.SH AUTHORS
|
||
|
|
.B ntfsfallocate
|
||
|
|
was written by Jean-Pierre Andre.
|
||
|
|
.SH AVAILABILITY
|
||
|
|
.B ntfsfallocate
|
||
|
|
is part of the
|
||
|
|
.B ntfs-3g
|
||
|
|
package and is available from:
|
||
|
|
.br
|
||
|
|
.nh
|
||
|
|
http://www.tuxera.com/community/
|
||
|
|
.hy
|
||
|
|
.SH SEE ALSO
|
||
|
|
.BR ntfs-3g (8),
|
||
|
|
.BR ntfstruncate (8),
|
||
|
|
.BR ntfsprogs (8),
|
||
|
|
.BR fallocate (1)
|