<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta name="keywords" content="Intel-Partitionstabelle,TestDisk DE" /> <link rel="shortcut icon" href="favicon.ico" /> <link rel="search" type="application/opensearchdescription+xml" href="opensearch_desc.php" title="CGSecurity (English)" /> <link rel="copyright" href="http://www.gnu.org/copyleft/fdl.html" /> <title>Intel-Partitionstabelle - CGSecurity</title> <style type="text/css" media="screen, projection">/*<![CDATA[*/ @import "shared.css_97.css"; @import "main.css_97.css"; /*]]>*/</style> <link rel="stylesheet" type="text/css" media="print" href="commonprint.css_97.css" /> <!--[if lt IE 5.5000]><style type="text/css">@import "ie50fixes.css_97.css";</style><![endif]--> <!--[if IE 5.5000]><style type="text/css">@import "ie55fixes.css_97.css";</style><![endif]--> <!--[if IE 6]><style type="text/css">@import "ie60fixes.css_97.css";</style><![endif]--> <!--[if IE 7]><style type="text/css">@import "ie70fixes.css_97.css";</style><![endif]--> <!--[if lt IE 7]><script type="text/javascript" src="iefixes.js_97"></script> <meta http-equiv="imagetoolbar" content="no" /><![endif]--> <script type= "text/javascript">/*<![CDATA[*/ var skin = "monobook"; var stylepath = "/mw/skins"; var wgArticlePath = "/wiki/$1"; var wgScriptPath = "/mw"; var wgScript = "/mw/index.php"; var wgServer = "http://www.cgsecurity.org"; var wgCanonicalNamespace = ""; var wgCanonicalSpecialPageName = false; var wgNamespaceNumber = 0; var wgPageName = "Intel-Partitionstabelle"; var wgTitle = "Intel-Partitionstabelle"; var wgAction = "view"; var wgRestrictionEdit = []; var wgRestrictionMove = []; var wgArticleId = "1829"; var wgIsArticle = true; var wgUserName = null; var wgUserGroups = null; var wgUserLanguage = "en"; var wgContentLanguage = "en"; var wgBreakFrames = false; var wgCurRevisionId = "3336"; /*]]>*/</script> <script type="text/javascript" src="wikibits.js_97"><!-- wikibits js --></script> <script type="text/javascript" src="http://www.cgsecurity.org/mw/index.php?title=-&action=raw&gen=js&useskin=monobook"><!-- site js --></script> <style type="text/css">/*<![CDATA[*/ @import "Common.css"; @import "Monobook.css"; @import "dyn.css"; /*]]>*/</style> <!-- Head Scripts --> <script type="text/javascript" src="ajax.js_97"></script> </head> <body class="mediawiki ns-0 ltr page-Intel-Partitionstabelle"> <div id="globalWrapper"> <div id="column-content"> <div id="content"> <a name="top" id="top"></a> <h1 class="firstHeading">Intel-Partitionstabelle</h1> <div id="bodyContent"> <h3 id="siteSub">From CGSecurity</h3> <div id="contentSub"></div> <div id="jump-to-nav">Jump to: <a href="#column-one">navigation</a>, <a href="#searchInput">search</a></div> <!-- start content --> <a name="Wie_ist_die_Partitionstabelle_geschrieben.3F"></a><h2> <span class="mw-headline"> Wie ist die Partitionstabelle geschrieben? </span></h2> <p>CHS (Cylinder, Head, Sector)-Werte sind von einer eingestellten Anzahl von Bits für jeden Wert in der 16-Byte-Partitionstabelle begrenzt auf: 1023,254,63. Also können LBA und CHS-Werte nicht gleich für Festplatten größer als 8 GB sein. </p><p>Es gibt zwei Arten, den CHS-Wert zu speichern: </p> <ul><li>erste Weg </li></ul> <pre> konvertiere LBA zu CHS, speichere (cylinder & 0x3FF, head & 0xFF, sector & 0x3F) </pre> <p>Das ist was Partition Magic (Versionen früher als 8.0?) macht. </p> <ul><li>zweite Weg </li></ul> <pre> konvertiere LBA zu CHS if cylinder <= 1023, speichere (cylinder & 0x3FF, head & 0xFF, sector & 0x3F) else speichere (1023, max_head & 0xFF, max_sector & 0x3F) </pre> <p>Dies ist, was Linux-fdisk und TestDisk tun. </p><p><br /> </p><p>Wenn TestDisk die Partitionstabelle überprüft, berücksichtigt es das beide Wege richtig sein können. Aber der zweite Weg ist besser, weil der CHS-Anfang ist immer niedriger oder gleich zum CHS-Ende. </p><p><br /> Beispiel: Die logische Geometrie einer Festplatte sind 255 Köpfe pro Zylinder und 63 Sektoren pro Kopf. Eine Partition beginnt bei LBA=46781280 oder CHS=2912,0,1. Diese Partition endet bei 3072,254,63. </p> <ul><li>Erste Weg: </li></ul> <pre> Start: 864, 0, 1 Ende: 0,254,63 </pre> <ul><li>Zweite Weg: </li></ul> <pre> Start: 1023,254,63 Ende: 1023,254,63 </pre> <p><br /> NB: 1023 = 0x3FF (1023*255+254)*63+63-1=16450559 (2912*255+ 0)*63+ 1-1=46781280 </p><p>Partition Magic (vor Version 8,0?) betrachtet den zweiten Weg als ungültig; obwohl es ein vereinbarter Standard ist. 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