{"id":58071,"date":"2026-11-03T17:12:17","date_gmt":"2026-11-03T09:12:17","guid":{"rendered":"https:\/\/www.amagicsoft.com\/?p=58071"},"modified":"2026-11-03T17:12:17","modified_gmt":"2026-11-03T09:12:17","slug":"partition-deletion","status":"publish","type":"post","link":"https:\/\/www.amagicsoft.com\/fr\/kb\/disk-partition\/partition-deletion.html","title":{"rendered":"Que se passe-t-il lorsque vous supprimez une partition ? Explications sur les modifications apport\u00e9es au MBR et au GPT"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"58071\" class=\"elementor elementor-58071\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-l2ablxi dtec-docx-root dtec-post-58071 e-flex e-con-boxed e-con e-parent\" data-id=\"l2ablxi\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-drfm64o elementor-widget elementor-widget-text-editor\" data-id=\"drfm64o\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>What happens when you delete a partition? The partitioning software removes its definition from the disk\u2019s active partition layout, so Windows can no longer access that region as the original volume. This does not necessarily overwrite every file, but it makes the space available for reuse and can put the remaining data at risk.<\/p>\n<p>The exact metadata changes differ between MBR and GPT disks. On GPT, the protective MBR usually remains unchanged even though a partition disappears. This article explains those differences for ordinary Windows 10 and Windows 11 basic disks, including what to inspect in WinHex. Dynamic disks and Storage Spaces require separate analysis.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-v2oh10l elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"v2oh10l\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;exclude_headings_by_selector&quot;:&quot;.faq-no-toc, h2:contains(Data Recovery Assessment)&quot;,&quot;marker_view&quot;:&quot;bullets&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;fas fa-circle&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__v2oh10l\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__v2oh10l\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__v2oh10l\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdrnqs7 elementor-widget elementor-widget-heading\" data-id=\"cdrnqs7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Changes When a Partition Is Deleted?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-s7h78ot elementor-widget elementor-widget-text-editor\" data-id=\"s7h78ot\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A partition table identifies disk regions. A file system organizes the files inside one of those regions. Deleting a partition primarily changes the first layer.<\/p>\n<table><tbody><tr><td><p><strong>Layer<\/strong><\/p><\/td><td><p><strong>Role<\/strong><\/p><\/td><td><p><strong>Effect of ordinary partition deletion<\/strong><\/p><\/td><\/tr><tr><td><p>Partition table<\/p><\/td><td><p>Defines partition locations and types<\/p><\/td><td><p>The selected partition is removed from the recognized layout<\/p><\/td><\/tr><tr><td><p>File-system metadata<\/p><\/td><td><p>Records directories, file allocation, and other volume information<\/p><\/td><td><p>May remain in the former partition region, although normal access is lost<\/p><\/td><\/tr><tr><td><p>File contents<\/p><\/td><td><p>Stores document, image, video, and other data<\/p><\/td><td><p>May remain readable until overwritten or otherwise made unavailable<\/p><\/td><\/tr><tr><td><p>Windows volume access<\/p><\/td><td><p>Presents the volume through a drive letter or mount point<\/p><\/td><td><p>The original volume is no longer available through its previous path<\/p><\/td><\/tr><\/tbody><\/table>\n<p>Windows commonly displays the former partition region as <strong>Unallocated<\/strong>. An MBR logical drive deleted from inside an extended partition can instead leave <strong>Free space<\/strong> within that container.<\/p>\n<p>Neither label proves that the underlying sectors contain zeros.<\/p>\n<p>Partition deletion also differs from several related operations:<\/p>\n<ul><li><strong>Removing a drive letter<\/strong> changes an access path while leaving the partition defined.<\/li><li><strong>Formatting<\/strong> creates file-system structures within a volume.<\/li><li><strong>DiskPart <\/strong><code class=\"dtec-inline-code\"><strong>clean<\/strong><\/code> removes disk-wide partitioning information.<\/li><li><strong>DiskPart <\/strong><code class=\"dtec-inline-code\"><strong>clean all<\/strong><\/code> writes zeros across the disk.<\/li><\/ul>\n<p>These operations should not be treated as interchangeable when assessing what remains recoverable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-zeyvl1h elementor-widget elementor-widget-heading\" data-id=\"zeyvl1h\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Changes in the MBR Partition Table?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-zc8ds5j elementor-widget elementor-widget-text-editor\" data-id=\"zc8ds5j\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>On a conventional MBR disk, four 16-byte partition records occupy bytes <code class=\"dtec-inline-code\">0x1BE\u20130x1FD<\/code> of LBA 0.<\/p>\n<table><tbody><tr><td><p><strong>Record<\/strong><\/p><\/td><td><p><strong>Absolute byte range from disk start<\/strong><\/p><\/td><\/tr><tr><td><p>First partition entry<\/p><\/td><td><p><code class=\"dtec-inline-code\">0x1BE\u20130x1CD<\/code><\/p><\/td><\/tr><tr><td><p>Second partition entry<\/p><\/td><td><p><code class=\"dtec-inline-code\">0x1CE\u20130x1DD<\/code><\/p><\/td><\/tr><tr><td><p>Third partition entry<\/p><\/td><td><p><code class=\"dtec-inline-code\">0x1DE\u20130x1ED<\/code><\/p><\/td><\/tr><tr><td><p>Fourth partition entry<\/p><\/td><td><p><code class=\"dtec-inline-code\">0x1EE\u20130x1FD<\/code><\/p><\/td><\/tr><tr><td><p>MBR signature<\/p><\/td><td><p><code class=\"dtec-inline-code\">0x1FE\u20130x1FF<\/code>, normally <code class=\"dtec-inline-code\">55 AA<\/code><\/p><\/td><\/tr><\/tbody><\/table>\n<p>Each record includes a partition type, starting LBA, and sector count. The <a href=\"https:\/\/www.amagicsoft.com\/wiki\/mbr-partition-table.html?utm_source=chatgpt.com\">MBR partition table guide<\/a> explains the complete record layout.<\/p>\n<h3>The deleted entry becomes unused<\/h3>\n<p>A common implementation clears the selected partition record to zeros. For example, the util-linux partitioning code clears the record when deleting an MBR primary partition.<\/p>\n<p>However, the exact bytes written are an implementation detail. Do not assume that every Windows utility and every third-party partition manager produces an identical sector image.<\/p>\n<p>A deleted partition table entry is no longer a valid description of the former partition. It is not normally retained as a complete record with a recoverable \u201cdeleted\u201d flag.<\/p>\n<p><strong>Example:<\/strong> Consider an MBR primary partition beginning at LBA 2,048 and containing 2,097,152 logical sectors.<\/p>\n<table><tbody><tr><td><p><strong>Field within its record<\/strong><\/p><\/td><td><p><strong>Relative offset<\/strong><\/p><\/td><td><p><strong>Before deletion<\/strong><\/p><\/td><td><p><strong>After an implementation clears the entire record<\/strong><\/p><\/td><\/tr><tr><td><p>Partition type<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x04<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">07<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">00<\/code><\/p><\/td><\/tr><tr><td><p>Starting LBA<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x08<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">00 08 00 00<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">00 00 00 00<\/code><\/p><\/td><\/tr><tr><td><p>Sector count<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x0C<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">00 00 20 00<\/code><\/p><\/td><td><p><code class=\"dtec-inline-code\">00 00 00 00<\/code><\/p><\/td><\/tr><\/tbody><\/table>\n<p>The multi-byte values use little-endian encoding. With 512-byte logical sectors, this example partition occupies 1 GiB. Type <code class=\"dtec-inline-code\">0x07<\/code> alone does not prove that its file system is NTFS.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-t3n1qn0 elementor-widget elementor-widget-image\" data-id=\"t3n1qn0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2026\/11\/mbr-partition-deletion-winhex-style.webp\" title=\"\" alt=\"What Changes in the MBR Partition Table\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-tigpmam elementor-widget elementor-widget-text-editor\" data-id=\"tigpmam\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>The whole MBR does not have to disappear<\/h3>\n<p>Deleting one primary partition does not inherently require erasing the bootstrap code, disk signature, other partition records, or final <code class=\"dtec-inline-code\">55 AA<\/code> signature.<\/p>\n<p>Consequently, finding <code class=\"dtec-inline-code\">55 AA<\/code> after deletion does not prove that the original partition still exists.<\/p>\n<p>Logical drives require an additional check. Their layout depends on Extended Boot Records, or EBRs, inside an extended partition. Deletion can modify those records or their links while leaving the top-level extended-partition record present in LBA 0.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4sybo4e elementor-widget elementor-widget-heading\" data-id=\"4sybo4e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Changes in GPT Partition Deletion Metadata?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-pcxw6cd elementor-widget elementor-widget-text-editor\" data-id=\"pcxw6cd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>GPT stores its partition definitions in a partition-entry array. The usual entry size is 128 bytes, but the header supplies the actual size.<\/p>\n<p>The <a href=\"https:\/\/www.amagicsoft.com\/kb\/disk-partition\/gpt-partition-entry.html?utm_source=chatgpt.com\">GPT partition entry structure<\/a> contains the following fields:<\/p>\n<table><tbody><tr><td><p><strong>Field<\/strong><\/p><\/td><td><p><strong>Offset within an entry<\/strong><\/p><\/td><td><p><strong>Meaning after deletion<\/strong><\/p><\/td><\/tr><tr><td><p>Partition type GUID<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x00<\/code><\/p><\/td><td><p>An all-zero type GUID identifies an unused entry<\/p><\/td><\/tr><tr><td><p>Unique partition GUID<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x10<\/code><\/p><\/td><td><p>May be cleared with the rest of the entry<\/p><\/td><\/tr><tr><td><p>Starting LBA<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x20<\/code><\/p><\/td><td><p>No longer defines an active partition when the entry is unused<\/p><\/td><\/tr><tr><td><p>Ending LBA<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x28<\/code><\/p><\/td><td><p>Same limitation as the starting LBA<\/p><\/td><\/tr><tr><td><p>Attributes<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x30<\/code><\/p><\/td><td><p>May be cleared<\/p><\/td><\/tr><tr><td><p>Partition name<\/p><\/td><td><p><code class=\"dtec-inline-code\">+0x38<\/code><\/p><\/td><td><p>May be cleared<\/p><\/td><\/tr><\/tbody><\/table>\n<p>The important distinction is between <strong>an unused entry<\/strong> and <strong>a guaranteed byte-for-byte deletion pattern<\/strong>.<\/p>\n<p>UEFI defines a zero partition type GUID as unused. Partitioning software may clear the whole entry; util-linux provides a concrete example of that behavior. A particular Windows operation still needs its own before-and-after capture to establish exactly which bytes it changed.<\/p>\n<p>An all-zero slot alone also cannot prove that deletion occurred. The slot might never have been used.<\/p>\n<h3>Both GPT copies should reflect the deletion<\/h3>\n<p>GPT maintains primary and backup partition metadata. A correctly completed update changes both copies to describe the current layout.<\/p>\n<p>This means the backup GPT is normally <strong>not an undo copy<\/strong> containing the deleted partition. Restoring it after an ordinary, successfully completed deletion usually restores the same current layout.<\/p>\n<p>A stale backup may exist after interrupted writes or corruption, but that is an inconsistency to investigate rather than a dependable recovery method.<\/p>\n<h3>Checksums must be recalculated<\/h3>\n<p>Changing the entry array requires updating its <code class=\"dtec-inline-code\">PartitionEntryArrayCRC32<\/code>. Because that checksum resides inside the header, the header\u2019s <code class=\"dtec-inline-code\">HeaderCRC32<\/code> must also be recalculated.<\/p>\n<p>The <a href=\"https:\/\/www.amagicsoft.com\/kb\/disk-partition\/gpt-header.html?utm_source=chatgpt.com\">GPT header guide<\/a> explains these relationships.<\/p>\n<p>Two fields are especially easy to misinterpret:<\/p>\n<ul><li><code class=\"dtec-inline-code\">NumberOfPartitionEntries<\/code> is the number of available entry slots, not the number currently occupied. Deleting one partition normally does not reduce it.<\/li><li><code class=\"dtec-inline-code\">DiskGUID<\/code> identifies the disk. Removing one partition does not inherently require changing that identifier.<\/li><\/ul>\n<p>Valid GPT checksums establish metadata consistency. They do not establish that the former partition\u2019s files remain intact.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fez320l elementor-widget elementor-widget-image\" data-id=\"fez320l\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2026\/11\/gpt-partition-deletion-winhex-style.webp\" title=\"\" alt=\"Both GPT copies should reflect the deletion\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eabu0by elementor-widget elementor-widget-heading\" data-id=\"eabu0by\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Does the Protective MBR Change When a GPT Partition Is Deleted?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a36vi9g elementor-widget elementor-widget-text-editor\" data-id=\"a36vi9g\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Usually, its meaningful partition information does not change.<\/p>\n<p>The structure sometimes called a GPT disk\u2019s \u201cvirtual MBR\u201d is more accurately called the <strong>protective MBR<\/strong>, or PMBR. It occupies LBA 0 and helps prevent older MBR-only utilities from treating the disk as empty.<\/p>\n<p>A standard protective MBR contains one <code class=\"dtec-inline-code\">0xEE<\/code> record. That record protects the GPT disk area; it does not separately describe each GPT partition.<\/p>\n<table><tbody><tr><td><p><strong>Protective record field<\/strong><\/p><\/td><td><p><strong>Normal meaning<\/strong><\/p><\/td><td><p><strong>Expected effect of deleting one GPT partition<\/strong><\/p><\/td><\/tr><tr><td><p>Partition type<\/p><\/td><td><p><code class=\"dtec-inline-code\">0xEE<\/code>, GPT protective<\/p><\/td><td><p>Remains <code class=\"dtec-inline-code\">0xEE<\/code><\/p><\/td><\/tr><tr><td><p>Starting LBA<\/p><\/td><td><p>LBA 1<\/p><\/td><td><p>Remains LBA 1<\/p><\/td><\/tr><tr><td><p>Sector count<\/p><\/td><td><p>Disk logical-block count minus one, capped at <code class=\"dtec-inline-code\">0xFFFFFFFF<\/code><\/p><\/td><td><p>Does not shrink by the deleted partition\u2019s size<\/p><\/td><\/tr><tr><td><p>Other three MBR records<\/p><\/td><td><p>Unused<\/p><\/td><td><p>Remain unused<\/p><\/td><\/tr><\/tbody><\/table>\n<p>If the protective record occupies the first MBR slot, WinHex shows its type byte at absolute offset <code class=\"dtec-inline-code\">0x1C2<\/code>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-jjdg2mn elementor-widget elementor-widget-image\" data-id=\"jjdg2mn\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2026\/11\/gpt-protective-mbr-unchanged-winhex-style.webp\" title=\"\" alt=\"What Happens When You Delete a Partition\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-qdhc8sa elementor-widget elementor-widget-text-editor\" data-id=\"qdhc8sa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>An unchanged protective MBR does not mean GPT partition deletion failed.<\/strong> The actual partition definitions reside in the GPT arrays.<\/p>\n<p>Software can rewrite or normalize LBA 0 while saving changes, so an identical whole-sector comparison is not a universal requirement. Hybrid MBR layouts also require separate treatment because they contain additional legacy partition mappings.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5tn5dkf elementor-widget elementor-widget-heading\" data-id=\"5tn5dkf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Happens to the File System and Files?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-z4t52io elementor-widget elementor-widget-text-editor\" data-id=\"z4t52io\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Removing a partition definition does not inherently require overwriting the former volume\u2019s boot sector, NTFS Master File Table, FAT structures, or every file-data sector.<\/p>\n<p>That separation explains how a scanner can sometimes locate a missing volume even after its partition-table record has been cleared.<\/p>\n<p>However, \u201cthe partition table changed\u201d is not enough to conclude that all file data survived:<\/p>\n<ul><li>Additional formatting or signature-wiping operations can damage file-system metadata.<\/li><li>New partitions and subsequent writes can overlap the original data.<\/li><li>TRIM, UNMAP, or related deallocation behavior can make storage ranges unavailable through normal reads.<\/li><li>Existing corruption may prevent a surviving file system from being reconstructed.<\/li><\/ul>\n<p>On SSDs and thin-provisioned storage, do not assume that avoiding new file copies guarantees recovery. Deallocation behavior depends on the operation, operating system, storage stack, and device.<\/p>\n<p>The partition\u2019s role also matters. Deleting a data partition removes normal access to its files. Deleting an <a href=\"https:\/\/www.amagicsoft.com\/kb\/disk-partition\/efi-system-partition.html?utm_source=chatgpt.com\">EFI System Partition<\/a> can prevent startup even while the Windows partition remains present.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-r91g15c elementor-widget elementor-widget-heading\" data-id=\"r91g15c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to Inspect the Changes in WinHex<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8irpdm elementor-widget elementor-widget-text-editor\" data-id=\"b8irpdm\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For an affected disk containing important files, preserve a disk image before investigating. Use a disposable test disk or virtual disk for a deliberate deletion experiment.<\/p>\n<p>A reliable comparison requires images captured <strong>before and after the same operation<\/strong>. An after-only image cannot show exactly what changed.<\/p>\n<h3>Identify the disk and its logical sector size<\/h3>\n<p>In an elevated PowerShell window, these commands query the current layout:<\/p>\n<ol><li><code class=\"dtec-inline-code dtec-command\">Get-Disk |<\/code><\/li><li>    Select-Object Number, FriendlyName, SerialNumber, PartitionStyle,<\/li><li>                  Size, LogicalSectorSize, PhysicalSectorSize<\/li><\/ol>\n<p>After identifying the correct disk, inspect its recognized partitions:<\/p>\n<ol><li><code class=\"dtec-inline-code dtec-command\">Get-Partition -DiskNumber 3 |<\/code><\/li><li>    Select-Object PartitionNumber, DriveLetter, Offset, Size, Type<\/li><\/ol>\n<p><code class=\"dtec-inline-code\">3<\/code> is an example disk number. Confirm the actual device by its model, capacity, and identifier before substituting it.<\/p>\n<p>These queries report the recognized layout; they do not recover a deleted entry.<\/p>\n<h3>Open the correct address space in read-only mode<\/h3>\n<p>Open the complete disk image in WinHex, or select the physical disk when direct examination is appropriate. Confirm <strong>Read-only\/View mode<\/strong> in the information pane.<\/p>\n<p>Opening a mounted volume starts from that volume\u2019s address space. It does not present the whole disk\u2019s LBA 0.<\/p>\n<p>Use the device\u2019s logical sector size when converting <a href=\"https:\/\/www.amagicsoft.com\/kb\/disk-partition\/lba.html?utm_source=chatgpt.com\">logical block addresses to byte offsets<\/a>:<\/p>\n<ol><li>Disk byte offset = LBA \u00d7 logical sector size<\/li><\/ol>\n<h3>Compare the relevant structures<\/h3>\n<p>For MBR, compare LBA 0, particularly the four partition records. Include the EBR chain when investigating a logical drive.<\/p>\n<p>For GPT:<\/p>\n<ol><li>Read the primary header at LBA 1.<\/li><li>Obtain <code class=\"dtec-inline-code\">PartitionEntryLBA<\/code>, <code class=\"dtec-inline-code\">SizeOfPartitionEntry<\/code>, and <code class=\"dtec-inline-code\">NumberOfPartitionEntries<\/code>.<\/li><li>Compare the relevant entries in both arrays.<\/li><li>Check the array and header checksums.<\/li><li>Compare the protective MBR separately.<\/li><\/ol>\n<p>For a zero-based entry index <code class=\"dtec-inline-code\">i<\/code>, its disk byte offset is:<\/p>\n<ol><li>PartitionEntryLBA \u00d7 logical sector size<\/li><li>+ i \u00d7 SizeOfPartitionEntry<\/li><\/ol>\n<p><strong>Example:<\/strong> With 512-byte logical sectors, an array beginning at LBA 2, and 128-byte entries, entry index 0 begins at <code class=\"dtec-inline-code\">0x400<\/code>. These are example conditions, not universal offsets.<\/p>\n<p>Finally, compare the former volume\u2019s starting sector using its recorded pre-deletion location. A surviving boot sector is useful evidence, but it does not prove that every directory or file remains readable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-s7ua24n elementor-widget elementor-widget-heading\" data-id=\"s7ua24n\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Recovering a Deleted Partition Structure Requires<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ohxaz70 elementor-widget elementor-widget-text-editor\" data-id=\"ohxaz70\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Recovering deleted partition structure means reconstructing a valid partition definition from surviving evidence. It differs from copying recoverable files to another disk.<\/p>\n<p>A candidate structure needs more support than a familiar signature. Check:<\/p>\n<ul><li>Whether the proposed start and length fit inside the disk.<\/li><li>Whether the file system\u2019s internal geometry agrees with those boundaries.<\/li><li>Whether it overlaps any partition that must remain.<\/li><li>Whether directories and representative files can be read.<\/li><li>Whether the proposed layout preserves other required partitions.<\/li><\/ul>\n<p>TestDisk can search for lost partitions and write selected definitions. Its search results still require review; finding a candidate does not make writing it automatically correct.<\/p>\n<p>If the immediate goal is retrieving documents or photos, recovering files to another physical disk can avoid committing a reconstructed layout first. The <a href=\"https:\/\/www.amagicsoft.com\/hdd-recovery\/lost-partition-recovery.html?utm_source=chatgpt.com\">lost partition recovery guide<\/a> explains how to choose an appropriate next step.<\/p>\n<p>After reconstruction, verify the recognized boundaries, readable folders, and actual files. For a system disk, startup verification is a separate requirement. A successful partition-table write alone does not confirm a complete recovery.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-lx0pbi3 elementor-widget elementor-widget-heading\" data-id=\"lx0pbi3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29op1wo faq-no-toc dtec-faq elementor-widget elementor-widget-elementskit-faq\" data-id=\"29op1wo\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"elementskit-faq.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\n                <div class=\"elementskit-single-faq elementor-repeater-item-7wh876k\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Does deleting the last partition convert GPT to MBR?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                No. Removing the last partition can leave a GPT disk with no occupied partition entries. Conversion or removal of the disk-wide partitioning structures is a separate operation.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-olpykmf\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Can the backup GPT restore an intentionally deleted partition?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Usually not after a correctly completed deletion, because both GPT copies should reflect the change. A backup helps with damaged metadata, but it does not normally preserve previous layouts.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-ikmb20o\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Does Unallocated mean every sector is empty?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                No. Unallocated describes the current partition layout. The region can still contain old file-system structures and file contents.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-op1bykk\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Can CHKDSK recreate a deleted partition entry?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                CHKDSK checks a file system on an accessible volume. It does not search the whole disk and reconstruct missing MBR or GPT partition boundaries.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-4yld7bm\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Does partition deletion put the files in the Recycle Bin?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                No. Partition deletion operates on the storage layout rather than moving individual files into the Recycle Bin. Restoring items from the Recycle Bin cannot recreate the missing partition.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-8d6hke7\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Will creating a partition with the same size restore everything?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Matching the displayed capacity is insufficient. The exact start, length, file-system condition, and other layout details matter, and formatting the replacement partition can overwrite evidence needed for recovery.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-6mb2qwa\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Is deleting a partition sufficient before selling a drive?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                No. Partition deletion is not a verified sanitization method. Use a sanitization procedure appropriate to the device and confirm its completion before transferring the drive.            <\/div>\n        <\/div>\n                                <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Does deleting the last partition convert GPT to MBR?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Removing the last partition can leave a GPT disk with no occupied partition entries. Conversion or removal of the disk-wide partitioning structures is a separate operation.\"}},{\"@type\":\"Question\",\"name\":\"Can the backup GPT restore an intentionally deleted partition?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Usually not after a correctly completed deletion, because both GPT copies should reflect the change. A backup helps with damaged metadata, but it does not normally preserve previous layouts.\"}},{\"@type\":\"Question\",\"name\":\"Does Unallocated mean every sector is empty?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Unallocated describes the current partition layout. The region can still contain old file-system structures and file contents.\"}},{\"@type\":\"Question\",\"name\":\"Can CHKDSK recreate a deleted partition entry?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CHKDSK checks a file system on an accessible volume. It does not search the whole disk and reconstruct missing MBR or GPT partition boundaries.\"}},{\"@type\":\"Question\",\"name\":\"Does partition deletion put the files in the Recycle Bin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Partition deletion operates on the storage layout rather than moving individual files into the Recycle Bin. Restoring items from the Recycle Bin cannot recreate the missing partition.\"}},{\"@type\":\"Question\",\"name\":\"Will creating a partition with the same size restore everything?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Matching the displayed capacity is insufficient. The exact start, length, file-system condition, and other layout details matter, and formatting the replacement partition can overwrite evidence needed for recovery.\"}},{\"@type\":\"Question\",\"name\":\"Is deleting a partition sufficient before selling a drive?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Partition deletion is not a verified sanitization method. Use a sanitization procedure appropriate to the device and confirm its completion before transferring the drive.\"}}]}<\/script>\n                \n    <\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What happens when you delete a partition? The partitioning software removes its definition from the disk\u2019s active partition layout, so Windows can no longer access that region as the original volume. This does not necessarily overwrite every file, but it makes the space available for reuse and can put the remaining data at risk. The [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":58072,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[842],"tags":[841],"class_list":["post-58071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-disk-partition","tag-knowledge-base"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What Happens When You Delete a Partition? | Amagicsoft<\/title>\n<meta name=\"description\" content=\"Learn what partition deletion changes in MBR and GPT, why the protective MBR usually stays unchanged, and the changes mean for data recovery.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.amagicsoft.com\/fr\/kb\/disk-partition\/partition-deletion.html\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Happens When You Delete a Partition? MBR and GPT Changes Explained\" \/>\n<meta property=\"og:description\" content=\"Learn what partition deletion changes in MBR and GPT, why the protective MBR usually stays unchanged, and the changes mean for data recovery.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.amagicsoft.com\/fr\/kb\/disk-partition\/partition-deletion.html\" \/>\n<meta property=\"og:site_name\" content=\"Amagicsoft\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/amagicsoft.2024\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-03T09:12:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.amagicsoft.com\/wp-content\/uploads\/2026\/11\/what-happens-when-you-delete-a-partition.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1350\" \/>\n\t<meta property=\"og:image:height\" content=\"760\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Jason\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Amagicsoft\" \/>\n<meta name=\"twitter:site\" content=\"@Amagicsoft\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jason\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.amagicsoft.com\\\/kb\\\/disk-partition\\\/partition-deletion.html#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.amagicsoft.com\\\/kb\\\/disk-partition\\\/partition-deletion.html\"},\"author\":{\"name\":\"Jason\",\"@id\":\"https:\\\/\\\/www.amagicsoft.com\\\/zh\\\/#\\\/schema\\\/person\\\/0578d4121e816aeb4661c464e92daf57\"},\"headline\":\"What Happens When You Delete a Partition? 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