{"id":39632,"date":"2025-12-20T07:35:22","date_gmt":"2025-12-19T23:35:22","guid":{"rendered":"https:\/\/www.amagicsoft.com\/?p=39632"},"modified":"2026-03-13T16:05:11","modified_gmt":"2026-03-13T08:05:11","slug":"non-system-disk-or-disk-error","status":"publish","type":"post","link":"https:\/\/www.amagicsoft.com\/jp\/disk-issue-fix\/non-system-disk-or-disk-error.html","title":{"rendered":"\u975e\u30b7\u30b9\u30c6\u30e0\u30c7\u30a3\u30b9\u30af\u307e\u305f\u306f\u30c7\u30a3\u30b9\u30af\u30a8\u30e9\u30fc\u3092\u4fee\u6b63\u3059\u308b\uff1a\u30d6\u30fc\u30c8\u306b\u95a2\u3059\u308b\u554f\u984c\u306e\u8aac\u660e"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"39632\" class=\"elementor elementor-39632\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6aeb194 e-flex e-con-boxed e-con e-parent\" data-id=\"6aeb194\" 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-ec3f90f elementor-widget elementor-widget-text-editor\" data-id=\"ec3f90f\" 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<div>\n<div>\u201c<strong>Non-System Disk or Disk Error<\/strong>\u201d is a <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/user-guide\/enable-bios-secure-boot.html\" target=\"_Blank\">BIOS\/UEFI<\/a> boot error message that appears when the computer cannot locate a valid bootable operating system on the selected startup device. The error usually appears immediately after power-on, before Windows or any other operating system starts loading. It most often results from an incorrect boot order, missing or corrupted boot records, or a disk that cannot boot properly. <a class=\"hyperlink\" href=\"https:\/\/learn.microsoft.com\/en-us\/answers\/questions\/3222113\/repair-disk-wont-boot-with-non-system-disk-or-disk\" rel=\"nofollow\" target=\"_Blank\">Microsoft documentation<\/a> categorizes this issue as a pre-OS boot failure, which means the problem occurs before the operating system kernel loads.<\/div>\n<\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-47997fa e-flex e-con-boxed e-con e-parent\" data-id=\"47997fa\" 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-f02016b elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"f02016b\" 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&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;bullets&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__f02016b\" 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__f02016b\" 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__f02016b\" 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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7f4f94c e-flex e-con-boxed e-con e-parent\" data-id=\"7f4f94c\" 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-47ec8ec elementor-widget elementor-widget-spacer\" data-id=\"47ec8ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-eae006c elementor-widget elementor-widget-text-editor\" data-id=\"eae006c\" 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<div><h2>What Causes the Non-System Disk Error?<\/h2><\/div>\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-c511ac9 elementor-widget elementor-widget-spacer\" data-id=\"c511ac9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-d205dc6 e-flex e-con-boxed e-con e-parent\" data-id=\"d205dc6\" 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-f7883a3 elementor-widget elementor-widget-text-editor\" data-id=\"f7883a3\" 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<div><div><p class=\"otl-paragraph\">This error usually does not mean that you have lost all data. When the issue occurs, the system often attempts to boot from the wrong device or cannot find valid boot information. As a result, user data typically remains intact even though the computer fails to start normally. Common causes include:<\/p><p class=\"otl-paragraph\">\u2022 <strong>An incorrect boot order<\/strong> in <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/user-guide\/enable-bios-secure-boot.html\" target=\"_Blank\">BIOS\/UEFI <\/a>(for example, the system prioritizes a USB drive or external disk over the internal system disk)<\/p><p class=\"otl-paragraph\">\u2022 <strong>Non-bootable media<\/strong> inserted into the computer, such as a USB flash drive or DVD<\/p><p class=\"otl-paragraph\">\u2022 <strong>Corrupted MBR or EFI boot files<\/strong><\/p><p class=\"otl-paragraph\">\u2022<strong> A disconnected or failing system drive<\/strong><\/p><p class=\"otl-paragraph\">\u2022 <strong>An incorrect partition marked as active (on MBR-based systems)<\/strong><\/p><p class=\"otl-paragraph\">\u2022 <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/hdd-recovery\/hdd-logical-failure.html\" target=\"_Blank\"><strong>File system errors<\/strong><\/a><strong> on the system partition<\/strong><\/p><p class=\"otl-paragraph\">In most cases, user data remains intact even though the system cannot boot.<\/p><\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-1b7b227 e-flex e-con-boxed e-con e-parent\" data-id=\"1b7b227\" 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-899be95 elementor-widget elementor-widget-spacer\" data-id=\"899be95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-33de69b elementor-widget elementor-widget-text-editor\" data-id=\"33de69b\" 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<div><h2>Immediate Checks Before Repair<\/h2><\/div>\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-6fb3eaa elementor-widget elementor-widget-spacer\" data-id=\"6fb3eaa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-6be6e48 e-flex e-con-boxed e-con e-parent\" data-id=\"6be6e48\" 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-0acc4ea elementor-widget elementor-widget-text-editor\" data-id=\"0acc4ea\" 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<div><div><p class=\"otl-paragraph\">Stay calm and complete the following basic checks before starting advanced repairs:<\/p><p class=\"otl-paragraph\"><strong>1. Remove external devices<\/strong><\/p><p class=\"otl-paragraph\">Disconnect all USB drives, memory cards, external hard drives, and DVDs.<\/p><p class=\"otl-paragraph\"><strong>2. Restart and enter BIOS\/UEFI<\/strong><\/p><p class=\"otl-paragraph\">Press <strong>Del<\/strong>, <strong>F2<\/strong>, or the manufacturer-specific key during startup.<\/p><p class=\"otl-paragraph\"><strong>3. Verify boot order<\/strong><\/p><p class=\"otl-paragraph\">Confirm that the internal system disk (<a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/ssd-drive.html\" target=\"_Blank\">SSD<\/a> or <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/hdd-hard-disk-drive.html\" target=\"_Blank\">HDD<\/a>) appears as the first boot device.<\/p><p class=\"otl-paragraph\">If the error continues to appear, move on to structured repair methods.<\/p><\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-035aeac e-flex e-con-boxed e-con e-parent\" data-id=\"035aeac\" 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-e2233af elementor-widget elementor-widget-spacer\" data-id=\"e2233af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-549388b elementor-widget elementor-widget-text-editor\" data-id=\"549388b\" 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<div><h2>How to Fix Non-System Disk or Disk Error (Step-by-Step)<\/h2><\/div>\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-981b9dd elementor-widget elementor-widget-spacer\" data-id=\"981b9dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-c6f4c32 e-flex e-con-boxed e-con e-parent\" data-id=\"c6f4c32\" 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-fa0b1ed elementor-widget elementor-widget-text-editor\" data-id=\"fa0b1ed\" 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<div><div><h3 class=\"otl-heading\">Method 1: Repair Boot Records (Windows)<\/h3><p class=\"otl-paragraph\">1. Boot the computer from a Windows installation USB.<\/p><p class=\"otl-paragraph\">2. Select <strong>Repair your computer \u2192 Troubleshoot \u2192 Advanced options \u2192 Command Prompt<\/strong>.<\/p><p class=\"otl-paragraph\">3. Run the following commands on MBR-based systems:<\/p><p class=\"otl-paragraph\"><code>bootrec \/fixmbr<\/code><\/p><p class=\"otl-paragraph\"><code>bootrec \/fixboot<\/code><\/p><p class=\"otl-paragraph\"><code>bootrec \/rebuildbcd<\/code><\/p><p class=\"otl-paragraph\">4. Restart the computer.<\/p><p class=\"otl-paragraph\">On UEFI systems, you may need to rebuild EFI boot files by using the <strong>bcdboot<\/strong> command.<\/p><p class=\"otl-paragraph\">\u00a0<\/p><h3 class=\"otl-heading\">Method 2: Check Disk and File System<\/h3><p class=\"otl-paragraph\">File system corruption can prevent the system from detecting boot information. Running the <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/chkdsk-f.html\" target=\"_Blank\"><strong>CHKDSK \/f<\/strong><\/a> command can resolve many logical disk issues.<\/p><p class=\"otl-paragraph\">1. Boot from a WinPE drive or connect the system disk to another computer.<\/p><p class=\"otl-paragraph\">2. Open <strong>Command Prompt<\/strong> from Windows Recovery.<\/p><p class=\"otl-paragraph\">3. Run:<\/p><p class=\"otl-paragraph\"><code>chkdsk C: \/f<\/code><\/p><p class=\"otl-paragraph\">4. Wait for the scan to finish, then reboot from the repaired drive.<\/p><\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-03d65a7 e-flex e-con-boxed e-con e-parent\" data-id=\"03d65a7\" 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-a19de6b elementor-widget elementor-widget-image\" data-id=\"a19de6b\" 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\/2025\/12\/chkdsk-f-1536x1340.webp\" title=\"\" alt=\"fix non system disk or disk error with chkdsk\" 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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-305f20b e-flex e-con-boxed e-con e-parent\" data-id=\"305f20b\" 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-fc4e308 elementor-widget elementor-widget-spacer\" data-id=\"fc4e308\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-69a0a91 elementor-widget elementor-widget-text-editor\" data-id=\"69a0a91\" 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<div><h2>Data Safety and Recovery Considerations<\/h2><\/div>\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-c8d8dbf elementor-widget elementor-widget-spacer\" data-id=\"c8d8dbf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-664f827 e-flex e-con-boxed e-con e-parent\" data-id=\"664f827\" 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-4a8e1e8 elementor-widget elementor-widget-text-editor\" data-id=\"4a8e1e8\" 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<div><div><p class=\"otl-paragraph\">When the disk appears in BIOS but still fails to boot, avoid formatting the drive or reinstalling Windows immediately. These actions can overwrite recoverable data.<\/p><p class=\"otl-paragraph\">At this stage, professional recovery software such as <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/magic-data-recovery\" target=\"_Blank\">Magic Data Recovery<\/a> by <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/\" target=\"_Blank\">Amagicsoft<\/a> allows you to scan the affected disk in <strong>read-only mode<\/strong>. This approach lets you recover personal files\u2014documents, photos, and videos\u2014before attempting invasive system repairs.<\/p><p class=\"otl-paragraph\"><strong>Magic Data Recovery supports:<\/strong><\/p><p class=\"otl-paragraph\">\u2022 Bootable and non-bootable disks<\/p><p class=\"otl-paragraph\">\u2022 <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/what-is-ntfs-file-system.html\" target=\"_Blank\">NTFS<\/a>, <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/what-is-fat32-file-system.html\" target=\"_Blank\">FAT32<\/a>, and <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/exfat-file-system.html\" target=\"_Blank\">exFAT<\/a> file systems<\/p><p class=\"otl-paragraph\">\u2022 External recovery through USB or secondary disk connections<\/p><\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-e6b53d9 e-flex e-con-boxed e-con e-parent\" data-id=\"e6b53d9\" 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-4afc5fa elementor-widget elementor-widget-spacer\" data-id=\"4afc5fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-23f5d91 elementor-widget elementor-widget-text-editor\" data-id=\"23f5d91\" 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<div><h2>When Hardware Failure Is Suspected<\/h2><\/div>\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-48837c9 elementor-widget elementor-widget-spacer\" data-id=\"48837c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-a7506ec e-flex e-con-boxed e-con e-parent\" data-id=\"a7506ec\" 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-cbc3949 elementor-widget elementor-widget-text-editor\" data-id=\"cbc3949\" 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<div><div><p class=\"otl-paragraph\">If the drive is not detected in BIOS or <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/wiki\/device-manager.html\" target=\"_Blank\">Device Manager<\/a>, the issue may be physical. In such cases:<\/p><ul><li class=\"otl-paragraph\">Try another computer or cable to see whether it can be recognized<\/li><li class=\"otl-paragraph\">Avoid repeated power cycling<\/li><li class=\"otl-paragraph\">Send the drive to a local recovery service company<\/li><\/ul><\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-e624bf1 e-flex e-con-boxed e-con e-parent\" data-id=\"e624bf1\" 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-82691d6 elementor-widget elementor-widget-spacer\" data-id=\"82691d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-4fbba8c elementor-widget elementor-widget-text-editor\" data-id=\"4fbba8c\" 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<div><h2>Conclusion<\/h2><\/div>\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-9a6ec2c elementor-widget elementor-widget-spacer\" data-id=\"9a6ec2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-48c053c e-flex e-con-boxed e-con e-parent\" data-id=\"48c053c\" 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-f3c9dde elementor-widget elementor-widget-text-editor\" data-id=\"f3c9dde\" 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<div><div>\u201c<strong>Non-System Disk or Disk Error<\/strong>\u201d points to a boot configuration or disk recognition issue rather than automatic data loss. By diagnosing the cause correctly, repairing boot settings carefully, and using <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/lost-file-recovery\/5-top-recovery-software.html\" target=\"_Blank\">professional recovery tools<\/a>, most users can restore system access or recover critical files safely. Download <a class=\"hyperlink\" href=\"https:\/\/www.amagicsoft.com\/magic-data-recovery\" target=\"_Blank\">Magic Data Recovery<\/a> to secure your data before performing system repairs or reinstalling Windows.<\/div><\/div>\t\t\t\t\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<div class=\"elementor-element elementor-element-40ef5ac4 e-con-full e-flex e-con e-child\" data-id=\"40ef5ac4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-5770321a e-con-full e-flex e-con e-child\" data-id=\"5770321a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4d69e9d4 elementor-widget__width-auto animated-fast elementor-align-center elementor-widget elementor-widget-elementskit-button\" data-id=\"4d69e9d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;,&quot;_animation_delay&quot;:200}\" data-widget_type=\"elementskit-button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\t\t<div class=\"ekit-btn-wraper\">\n\t\t\t\t\t\t\t<a href=\"https:\/\/download.amagicsoft.com\/product\/mdr\/magic-data-recovery.exe\" class=\"elementskit-btn  whitespace--normal\" id=\"\">\n\t\t\t\t\tDownload Magic Data Recovery\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n        <\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15ca210a elementor-widget elementor-widget-text-editor\" data-id=\"15ca210a\" 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 style=\"text-align: center;\">Supports Windows 7\/8\/10\/11 and Windows Server<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2538c07 e-flex e-con-boxed e-con e-parent\" data-id=\"2538c07\" 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-264fa01 elementor-widget elementor-widget-spacer\" data-id=\"264fa01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-69b452a elementor-widget elementor-widget-text-editor\" data-id=\"69b452a\" 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<div><h2>FAQ: Non-System Disk or Disk Error<\/h2><\/div>\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-0e76738 elementor-widget elementor-widget-spacer\" data-id=\"0e76738\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\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<div class=\"elementor-element elementor-element-2ecb34c e-flex e-con-boxed e-con e-parent\" data-id=\"2ecb34c\" 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-d9d4c13 faq-no-toc elementor-widget elementor-widget-elementskit-faq\" data-id=\"d9d4c13\" 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-9f0c02d\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How to solve non-system disk or disk error?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Start by removing any external storage devices and checking the boot order in BIOS or UEFI. Make sure the system disk is set as the primary boot device. If the error persists, repair the boot records using Windows Recovery tools or check the disk for file system errors with CHKDSK.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-bb6b4c5\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How do I fix a disk error?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Disk errors are commonly resolved by running a file system check. In Windows, this can be done using the CHKDSK command from Command Prompt. For boot-related disk errors, repairing the MBR, EFI, or BCD files may also be required.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-5f20f91\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">What is a non system disk or disk error in Windows 11?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                In Windows 11, this error indicates that the firmware cannot find a valid bootable operating system on the selected disk. It usually results from incorrect boot order, corrupted boot files, or a damaged system partition rather than permanent data loss.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-62517d0\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How to fix hard disk error on HP?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                On HP computers, first press Esc during startup and enter BIOS to confirm the correct boot device. HP systems also provide built-in hardware diagnostics that can be used to test disk health. If the disk passes hardware checks, boot repair or file system repair is typically effective.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-08003e6\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">What are the common boot problems?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Common boot problems include missing or corrupted boot records, incorrect active partitions, damaged system files, incompatible firmware settings (UEFI vs. Legacy), and disk file system corruption. These issues usually affect system startup but do not immediately erase user data.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-7490fc3\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">Is it safe to repair disk errors myself?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                Yes, basic repairs such as adjusting boot order or running CHKDSK are generally safe. However, advanced actions like formatting, reinstalling Windows, or rewriting partitions should be avoided until important data has been backed up or recovered using professional recovery software.            <\/div>\n        <\/div>\n                <div class=\"elementskit-single-faq elementor-repeater-item-a8d5cda\">\n            <div class=\"elementskit-faq-header\">\n                <h3 class=\"elementskit-faq-title\">How to reboot the computer if it has system error?<\/h3>\n            <\/div>\n            <div class=\"elementskit-faq-body\">\n                On a physical keyboard, press Ctrl + Alt + Del simultaneously. On some laptops, you may need to hold the Fn key as well. If the system is unresponsive, use the power button to perform a controlled shutdown instead.            <\/div>\n        <\/div>\n                                <script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How to solve non-system disk or disk error?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Start by removing any external storage devices and checking the boot order in BIOS or UEFI. Make sure the system disk is set as the primary boot device. If the error persists, repair the boot records using Windows Recovery tools or check the disk for file system errors with CHKDSK.\"}},{\"@type\":\"Question\",\"name\":\"How do I fix a disk error?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Disk errors are commonly resolved by running a file system check. In Windows, this can be done using the CHKDSK command from Command Prompt. 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However, advanced actions like formatting, reinstalling Windows, or rewriting partitions should be avoided until important data has been backed up or recovered using professional recovery software.\"}},{\"@type\":\"Question\",\"name\":\"How to reboot the computer if it has system error?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"On a physical keyboard, press Ctrl + Alt + Del simultaneously. On some laptops, you may need to hold the Fn key as well. If the system is unresponsive, use the power button to perform a controlled shutdown instead.\"}}]}<\/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>\u201cNon-System Disk or Disk Error\u201d is a BIOS\/UEFI boot error message that appears when the computer cannot locate a valid bootable operating system on the selected startup device. The error usually appears immediately after power-on, before Windows or any other operating system starts loading. It most often results from an incorrect boot order, missing or corrupted boot records, or a disk that cannot boot properly. Microsoft documentation categorizes this issue as a pre-OS boot failure, which means the problem occurs before the operating system kernel loads. Table of Contents What Causes the Non-System Disk Error? This error usually does not mean that you have lost all data. When the issue [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":39633,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[828],"tags":[738],"class_list":["post-39632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-disk-issue-fix","tag-wiki"],"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>Non System Disk or Disk Error: Fix Boot Issues | Amagicsoft<\/title>\n<meta name=\"description\" content=\"Learn what Non-System Disk or Disk Error means, why it occurs, and how to fix boot errors safely using proven methods without data loss.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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