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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/concepts/index_header.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>Index Header - Concept - 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"> </td> <td class="toolbar"><a accesskey="2" class="toolbar" href="../files/index.html">Files</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="3" class="toolbar" href="../attributes/index.html">Attributes</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="4" class="toolbar" href="../concepts/index.html">Concepts</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="5" class="toolbar" href="../help/glossary.html">Glossary</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="6" class="toolbar" href="../help/index.html">Help</a></td> </tr> </table> <h1>Concept - Index Header</h1> <a class="prevnext" accesskey="," href="fixup.html">Previous</a> <a class="prevnext" accesskey="." href="index_record.html">Next</a> <h2>Overview</h2> <p> Every Index Record has a standard header and a set of blocks containing an Index Key and Index Data. </p> <p class="check"> The size of an Index Record is defined in <a href="../files/boot.html">$Boot</a> and always seems to be 4KB. <!-- comment about size being a per-index parameter --> <!-- comment about size being max (2KB, Cluster Size) --> </p> <h2>Layout</h2> <h3>Standard Index Header</h3> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Offset</th> <th class="numeric">Size</th> <th>Description</th> </tr> <tr> <td class="numeric">0x00</td> <td class="numeric">4</td> <td>Magic number 'INDX'</td> </tr> <tr> <td class="numeric">0x04</td> <td class="numeric">2</td> <td>Offset to the Update Sequence</td> </tr> <tr> <td class="numeric">0x06</td> <td class="numeric">2</td> <td>Size in words of the Update Sequence Number & Array (S)</td> </tr> <tr> <td class="numeric">0x08</td> <td class="numeric">8</td> <td>$LogFile sequence number</td> </tr> <tr> <td class="numeric">0x10</td> <td class="numeric">8</td> <td>VCN of this INDX buffer in the Index Allocation</td> </tr> <tr> <td class="numeric">0x18</td> <td class="numeric">4</td> <td>Offset to the Index Entries (a)</td> </tr> <tr> <td class="numeric">0x1C</td> <td class="numeric">4</td> <td>Size of Index Entries (a)</td> </tr> <tr> <td class="numeric">0x20</td> <td class="numeric">4</td> <td>Allocated size of the Index Entries (a)</td> </tr> <tr> <td class="numeric">0x24</td> <td class="numeric">1</td> <td>1 if not leaf node (b)</td> </tr> <tr> <td class="numeric">0x25</td> <td class="numeric">3</td> <td>Padding (always zero)</td> </tr> <tr> <td class="numeric">0x28</td> <td class="numeric">2</td> <td>Update sequence</td> </tr> <tr> <td class="numeric">0x2A</td> <td class="numeric">2S-2</td> <td>Update sequence array</td> </tr> </table> <pre>(a) These values are relative to 0x18</pre> <pre>(b) Has children</pre> <h2>Notes</h2> <h3>List of Common Indexes</h3> <table border="1" summary="" cellspacing="0"> <tr> <th>Name</th> <th>Index Of</th> <th>Description</th> </tr> <tr> <td><a href="../help/glossary.html#i30">$I30</a></td> <td><a href="../attributes/file_name.html">Filenames</a></td> <td><a href="directory.html">Used by Directories</a></td> </tr> <tr> <td><a href="../help/glossary.html#sdh">$SDH</a></td> <td><a href="../attributes/security_descriptor.html">Security Descriptors</a></td> <td><a href="../files/secure.html">$Secure</a></td> </tr> <tr> <td><a href="../help/glossary.html#sii">$SII</a></td> <td><a href="../files/secure.html">Security Ids</a></td> <td><a href="../files/secure.html">$Secure</a></td> </tr> <tr> <td><a href="../help/glossary.html#o">$O</a></td> <td><a href="../files/objid.html">Object Ids</a></td> <td><a href="../files/objid.html">$ObjId</a></td> </tr> <tr> <td><a href="../help/glossary.html#o">$O</a></td> <td><a href="../files/quota.html">Owner Ids</a></td> <td><a href="../files/quota.html">$Quota</a></td> </tr> <tr> <td><a href="../help/glossary.html#q">$Q</a></td> <td><a href="../files/quota.html">Quotas</a></td> <td><a href="../files/quota.html">$Quota</a></td> </tr> <tr> <td><a href="../help/glossary.html#r">$R</a></td> <td><a href="../attributes/reparse_point.html">Reparse Points</a></td> <td><a href="../files/reparse.html">$Reparse</a></td> </tr> </table> <h3>Other Information</h3> <p> There is no information contained in the Index Record describing what the index is storing (this is kept in the Index Root). </p> <br> <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/concepts/index_header.html">Online</a> <!-- The two validators will only work if this page is visible on the web --> <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a> <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a> <a class="contact" href="mailto:webmaster@flatcap.org">$Id: index_header.html,v 1.9 2001/07/24 12:54:36 flatcap Exp $</a> </body></html>⌨️ 快捷键说明
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