📄 bitmap.html

📁 这是NTFS文件0.5版本技术文件
💻 HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/attributes/bitmap.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>$BITMAP (0xB0) - Attribute - 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>Attribute - $BITMAP (0xB0)</h1>    <a class="prevnext" accesskey="," href="index_allocation.html">Previous</a>    <a class="prevnext" accesskey="." href="reparse_point.html">Next</a>    <h2>Overview</h2>    <p>    This file attribute is a sequence of bits, each of which represents the status of an entity.     </p>    <p>    As defined in <a href="../files/attrdef.html">$AttrDef</a>, this attribute    has a no minimum or maximum size.    </p>    <h2>Layout of the Attribute</h2>    <p>    This attribute is currently used in two places: indexes (e.g. directories), $MFT.    N.B. The index entries and the FILE records also have flags in them to show    if they are in use or not.    </p>    <p>    In an index, the bit field shows which index entries are in use.    Each bit represents one VCN of the index allocation.    </p>    <p>    In the $MFT, the bit field shows which FILE records are in use.    </p>    <table border="1" summary="" cellspacing="0">      <tr>        <th class="numeric">Offset</th>        <th class="numeric">Size</th>        <th>Description</th>      </tr>      <tr>        <td class="numeric">~</td>        <td class="numeric">~</td>        <td><a href="../concepts/attribute_header.html">Standard Attribute Header</a></td>      </tr>      <tr>        <td class="numeric">0x00</td>        <td class="numeric">&nbsp;</td>        <td>Bit field</td>      </tr>    </table>    <h2>Notes</h2>    <br>    <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/attributes/bitmap.html">Online</a>    <!-- The two validators will only work if this page is visible on the web -->    <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a>    <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a>    <a class="contact" href="mailto:webmaster@flatcap.org">$Id: bitmap.html,v 1.8 2001/07/11 16:31:44 flatcap Exp $</a>  </body></html>
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