191 lines
6.8 KiB
HTML
191 lines
6.8 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of NTFSFALLOCATE</TITLE>
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</HEAD><BODY>
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<H1>NTFSFALLOCATE</H1>
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Section: Maintenance Commands (8)<BR>Updated: June 2014<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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ntfsfallocate - preallocate space to a file on an NTFS volume
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>ntfsfallocate</B> [<I>options</I>] -l <I>length</I> <I>device</I> <I>file</I> <I>[attr-type</I> [<I>attr-name</I>]]
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<B>ntfsfallocate</B>
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preallocates space for any attribute of a file or directory, thus reserving
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space before actual contents is written. This is similar to <A HREF="/cgi-bin/man/man2html?1+fallocate">fallocate</A>(1).
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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Below is a summary of all the options that
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<B>ntfsfallocate</B>
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accepts. Nearly all options have two equivalent names. The short name is
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preceded by
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<B>-</B>
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and the long name is preceded by
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<B>--</B>.
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Any single letter options, that don't take an argument, can be combined into a
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single command, e.g.
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<B>-fv</B>
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is equivalent to
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<B>-f -v</B>.
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Long named options can be abbreviated to any unique prefix of their name.
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<DL COMPACT>
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<DT id="1"><B>-f</B>, <B>--force</B><DD>
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This will override some sensible defaults, such as not using a mounted volume.
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Use this option with caution.
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<DT id="2"><B>-h</B>, <B>--help</B><DD>
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Show a list of options with a brief description of each one.
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<DT id="3"><B>-l</B>, <B>--length</B> LENGTH<DD>
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This is a mandatory option to specify the number of bytes to preallocate.
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It will be rounded up to a multiple of the cluster size.
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A suffix of K, M, G, T, P or E may be appended to
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mean a multiplicative factor of a power of 1000. Similarly a suffix of
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Ki, Mi, Gi, Ti, Pi or Ei may be appended to mean a multiplicative factor
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of a power of 1024.
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<DT id="4"><B>-n</B>, <B>--no-size-change</B><DD>
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Do not change the apparent size of the file. The space allocated beyond
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the apparent size is not zeroed, but subsequent writing beyond the apparent
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end of file will force zeroing the inner allocated space as it cannot be
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considered as a hole any more, and this may take significant time.
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<DT id="5"><B>-N</B>, <B>--no-action</B><DD>
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Simulate the allocation without actually write to device.
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<DT id="6"><B>-o</B>, <B>--offset</B> OFFSET<DD>
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Specify the offset in the file where preallocation starts. By default,
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the preallocation is counted from the beginning of the file. Space already
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allocated in the area defined by offset and length is preserved.
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<DT id="7"><B>-q</B>, <B>--quiet</B><DD>
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Suppress some debug/warning/error messages.
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<DT id="8"><B>-v</B>, <B>--verbose</B><DD>
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Display more debug/warning/error messages.
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<DT id="9"><B>-V</B>, <B>--version</B><DD>
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Show the version number, copyright and license of
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<B>ntfsfallocate</B>.
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<DT id="10"><B>attr-type</B><DD>
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Define a particular attribute type to be preallocated (advanced use only).
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By default, the unnamed $DATA attribute (the contents of a plain file) will
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be preallocated. The attribute has to be specified by a number in decimal
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or hexadecimal :
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<TABLE BORDER><TR><TD><TABLE>
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<TR VALIGN=top><TD><B>Hex</B></TD><TD><B>Decimal</B></TD><TD><B>Name</B><BR></TD></TR>
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<TR VALIGN=top><TD>0x10</TD><TD>16</TD><TD>"$STANDARD_INFORMATION"<BR></TD></TR>
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<TR VALIGN=top><TD>0x20</TD><TD>32</TD><TD>"$ATTRIBUTE_LIST"<BR></TD></TR>
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<TR VALIGN=top><TD>0x30</TD><TD>48</TD><TD>"$FILE_NAME"<BR></TD></TR>
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<TR VALIGN=top><TD>0x40</TD><TD>64</TD><TD>"$OBJECT_ID"<BR></TD></TR>
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<TR VALIGN=top><TD>0x50</TD><TD>80</TD><TD>"$SECURITY_DESCRIPTOR"<BR></TD></TR>
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<TR VALIGN=top><TD>0x60</TD><TD>96</TD><TD>"$VOLUME_NAME"<BR></TD></TR>
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<TR VALIGN=top><TD>0x70</TD><TD>112</TD><TD>"$VOLUME_INFORMATION"<BR></TD></TR>
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<TR VALIGN=top><TD>0x80</TD><TD>128</TD><TD>"$DATA"<BR></TD></TR>
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<TR VALIGN=top><TD>0x90</TD><TD>144</TD><TD>"$INDEX_ROOT"<BR></TD></TR>
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<TR VALIGN=top><TD>0xA0</TD><TD>160</TD><TD>"$INDEX_ALLOCATION"<BR></TD></TR>
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<TR VALIGN=top><TD>0xB0</TD><TD>176</TD><TD>"$BITMAP"<BR></TD></TR>
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<TR VALIGN=top><TD>0xC0</TD><TD>192</TD><TD>"$REPARSE_POINT"<BR></TD></TR>
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<TR VALIGN=top><TD>0xD0</TD><TD>208</TD><TD>"$EA_INFORMATION"<BR></TD></TR>
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<TR VALIGN=top><TD>0xE0</TD><TD>224</TD><TD>"$EA"<BR></TD></TR>
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<TR VALIGN=top><TD>0xF0</TD><TD>240</TD><TD>"$PROPERTY_SET"<BR></TD></TR>
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<TR VALIGN=top><TD>0x100</TD><TD>256</TD><TD>"$LOGGED_UTILITY_STREAM"<BR></TD></TR>
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</TABLE></TABLE>
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<P>
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<DT id="11"><B>attr-name</B><DD>
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Define the name of the particular attribute type to be preallocated
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(advanced use only).
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</DL>
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<A NAME="lbAF"> </A>
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<H2>EXAMPLES</H2>
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Preallocate 100MB to the file database.db located in the Data directory
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which is at the root of an NTFS file system.
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<DL COMPACT><DT id="12"><DD>
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<P>
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<B>ntfsfallocate -l 100M /dev/sda1 Data/database.db</B>
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<P>
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</DL>
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<A NAME="lbAG"> </A>
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<H2>BUGS</H2>
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There are no known problems with
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<B>ntfsfallocate</B>,
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however it can lead to configurations not supported by Windows
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and Windows may crash (BSOD) when writing to preallocated clusters
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which were not written to earlier. Files with preallocated space should
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be fully be written to before they are updated by Windows.
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<P>
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If you find a bug in <B>ntfsfallocate</B> proper, please send an email
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describing the problem to the development team:
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<BR>
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<A HREF="mailto:ntfs-3g-devel@lists.sf.net">ntfs-3g-devel@lists.sf.net</A>
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<A NAME="lbAH"> </A>
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<H2>AUTHORS</H2>
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<B>ntfsfallocate</B>
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was written by Jean-Pierre Andre.
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<A NAME="lbAI"> </A>
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<H2>AVAILABILITY</H2>
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<B>ntfsfallocate</B>
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is part of the
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<B>ntfs-3g</B>
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package and is available from:
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<BR>
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<A HREF="http://www.tuxera.com/community/">http://www.tuxera.com/community/</A>
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<A NAME="lbAJ"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?8+ntfs-3g">ntfs-3g</A></B>(8),
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<B><A HREF="/cgi-bin/man/man2html?8+ntfstruncate">ntfstruncate</A></B>(8),
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<B><A HREF="/cgi-bin/man/man2html?8+ntfsprogs">ntfsprogs</A></B>(8),
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<B><A HREF="/cgi-bin/man/man2html?1+fallocate">fallocate</A></B>(1)
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="13"><A HREF="#lbAB">NAME</A><DD>
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<DT id="14"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="15"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="16"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="17"><A HREF="#lbAF">EXAMPLES</A><DD>
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<DT id="18"><A HREF="#lbAG">BUGS</A><DD>
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<DT id="19"><A HREF="#lbAH">AUTHORS</A><DD>
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<DT id="20"><A HREF="#lbAI">AVAILABILITY</A><DD>
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<DT id="21"><A HREF="#lbAJ">SEE ALSO</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:06:14 GMT, March 31, 2021
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