📄 mft.html

📁 这是NTFS文件0.5版本技术文件
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/files/mft.html --><html lang="en">  <head>    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">    <meta name="description" content="NTFS Documentation">    <link rel="stylesheet" type="text/css" href="../style/ntfsdoc.css">    <link rel="start" type="text/html" href="../index.html" title="NTFS Documentation">    <title>$MFT (0) - File - NTFS Documentation</title>  </head>  <body>    <table border="0" class="toolbar" summary="" cellspacing="0">      <tr>        <td class="toolbar"><a accesskey="1" class="toolbar" href="../index.html">Home</a></td>        <td class="toolbar">&nbsp;</td>        <td class="toolbar"><a accesskey="2" class="toolbar" href="../files/index.html">Files</a></td>        <td class="toolbar">&nbsp;</td>        <td class="toolbar"><a accesskey="3" class="toolbar" href="../attributes/index.html">Attributes</a></td>        <td class="toolbar">&nbsp;</td>        <td class="toolbar"><a accesskey="4" class="toolbar" href="../concepts/index.html">Concepts</a></td>        <td class="toolbar">&nbsp;</td>        <td class="toolbar"><a accesskey="5" class="toolbar" href="../help/glossary.html">Glossary</a></td>        <td class="toolbar">&nbsp;</td>        <td class="toolbar"><a accesskey="6" class="toolbar" href="../help/index.html">Help</a></td>      </tr>    </table>    <h1>File - $MFT (0)</h1>    <a class="prevnext" accesskey="," href="index.html">Previous</a>    <a class="prevnext" accesskey="." href="mftmirr.html">Next</a>     <h2>Overview</h2>    <p>    In NTFS, everything on disk is a file.  Even the metadata is stored as a set of files.    The Master File Table (MFT) is an index of every file on the volume.    For each file, the MFT keeps a set of records called attributes and    each attribute stores a different type of information.    </p>    <h2><a class="heading" href="../attributes/index.html">Attributes</a></h2>    <table border="1" summary="" cellspacing="0">      <tr>        <th class="numeric">Type</th>        <th>Description</th>        <th>Name</th>      </tr>      <tr>        <td class="numeric"><a class="numeric" href="../attributes/standard_information.html">0x10</a></td>        <td><a href="../attributes/standard_information.html">$STANDARD_INFORMATION</a></td>        <td>&nbsp;</td>      </tr>      <tr>        <td class="numeric"><a class="numeric" href="../attributes/file_name.html">0x30</a></td>        <td><a href="../attributes/file_name.html">$FILE_NAME</a></td>        <td>$MFT</td>      </tr>      <tr>        <td class="numeric"><a class="numeric" href="../attributes/data.html">0x80</a></td>        <td><a href="../attributes/data.html">$DATA</a></td>        <td>[Unnamed]</td>      </tr>      <tr>        <td class="numeric"><a class="numeric" href="../attributes/bitmap.html">0xB0</a></td>        <td><a href="../attributes/bitmap.html">$BITMAP</a></td>        <td>[Unnamed]</td>      </tr>    </table>    <h2>Layout of the File</h2>    <h3>Unnamed Data Stream</h3>    <p>    The description of each file is packed into    <a href="../concepts/file_record.html">FILE records</a>.    If one record is not large enough (this is unusual), then an    <a href="../attributes/attribute_list.html">$ATTRIBUTE_LIST</a> attribute is needed.    </p>    <p>    The first 24 FILE records are reserved for the system files.    For a full list see the <a href="../files/index.html">Files page</a>.    </p>    <table border="1" summary="" cellspacing="0">      <tr>        <th class="numeric">Inode</th>        <th>Filename</th>        <th>Description</th>      </tr>      <tr>        <td class="numeric">0</td>        <td><a href="mft.html">$MFT</a></td>        <td>Master File Table - An index of every file</td>      </tr>      <tr>        <td class="numeric">1</td>        <td><a href="mftmirr.html">$MFTMirr</a></td>        <td>A backup copy of the first 4 records of the MFT</td>      </tr>      <tr>        <td class="numeric">2</td>        <td><a href="logfile.html">$LogFile</a></td>        <td>Transactional logging file</td>      </tr>      <tr>        <td class="numeric">3</td>        <td><a href="volume.html">$Volume</a></td>        <td>Serial number, creation time, dirty flag</td>      </tr>      <tr>        <td class="numeric">...</td>        <td>...</td>        <td>...</td>      </tr>    </table>    <h2>Notes</h2>    <h3>MFT Zone</h3>    <p>    To prevent the MFT becoming fragmented, Windows maintains a buffer    around it.  No new files will be created in this buffer region    until the other disk space is used up.  The buffer size is configurable    and can be 12.5%, 25%, 37.5% or 50% of the disk.  Each time the rest    of the disk becomes full, the buffer size is halved.    </p>    <h3>Other Information</h3>    <p>The MFT is self-referencing.</p>    <p>    The MFT has some space reserved for future expansion.    MFT records 12&nbsp;-&nbsp;15 are marked as in use, but    are empty.  MFT records 16&nbsp;-&nbsp;23 are marked as    not in use, however they are never used.    </p>    <p>    Under Windows, the MFT cannot shrink whilst the system is running.     </p>    <br>    <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/files/mft.html">Online</a>    <!-- The two validators will only work if this page is visible on the web -->    <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a>    <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a>    <a class="contact" href="mailto:webmaster@flatcap.org">$Id: mft.html,v 1.10 2001/07/11 16:31:45 flatcap Exp $</a>  </body></html>
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