{"id":7259,"date":"2016-10-05T03:40:39","date_gmt":"2016-10-05T03:40:39","guid":{"rendered":"https:\/\/www.cleverfiles.com\/help\/?p=7259"},"modified":"2025-08-19T12:33:44","modified_gmt":"2025-08-19T12:33:44","slug":"managing-bad-sectors-disk-drill","status":"publish","type":"post","link":"https:\/\/www.cleverfiles.com\/help\/bad-sectors-blocks.html","title":{"rendered":"Managing Bad Sectors in Disk Drill for macOS \u2014 Bad Blocks &#038; Slow Read Blocks Explained"},"content":{"rendered":"<p>During a scan, Disk Drill\u2019s data\u2011recovery power engine may temporarily flag certain sectors as bad (also called bad blocks) when repeated read attempts fail. This helps keep the scan fast by skipping unstable areas that would otherwise stall progress. These flags exist only inside Disk Drill\u2014they don\u2019t modify your drive\u2014and you can clear them at any time to rescan those sectors for additional data. This approach is especially useful when you\u2019re trying to recover sensitive files from lightly damaged regions of a hard drive or SSD. For details and step\u2011by\u2011step instructions, see our guide to managing bad sectors in Disk Drill.<\/p>\n<div class=\"post-relative post-download\">\r\n<i class=\"box-60x36 icons icon-winmac-xs  \"><\/i>\r\nDownload Disk Drill data recovery app\r\n<a class=\"btn btn-primary btn-xs-block pull-right\" href=\"\/\/www.cleverfiles.com\/dl.html\">Download now<\/a>\r\n<div class=\"clearfix\"><\/div>\r\n<\/div><p>\n<h2><span class=\"ez-toc-section\" id=\"what_are_%e2%80%9cbad_blocks%e2%80%9d_bad_sectors\"><\/span><b>What Are &#8220;Bad Blocks&#8221; (Bad Sectors)?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>At the media level, a bad sector is a logical block address (LBA) the drive can\u2019t read reliably anymore. Bad sectors are often categorized as:<\/p>\n<ul>\n<li><b>Hard\/physical<\/b>: irreversible media damage (platter defects, NAND cell wear).<\/li>\n<li><b>Soft\/logical<\/b>: data in the sector exceeds ECC correction limits or metadata is inconsistent; a later rewrite may succeed or trigger hardware remap.<\/li>\n<\/ul>\n<p>Modern disks keep spares and remap failing sectors on write, <a href=\"\/help\/monitor-smart-status-disk-health\/\">tracking health through S.M.A.R.T. attributes<\/a> such as <b>Reallocated Sectors (ID 5)<\/b>, <b>Current Pending (ID 197)<\/b>, and <b>Uncorrectable (ID 198)<\/b>\u2014rising values tend to increase failure probability and warrant immediate backup.<\/p>\n<p><b>Why they happen<\/b><\/p>\n<ul>\n<li>Media wear or head\/media contact (HDD)<\/li>\n<li>Program\/erase wear and weak cells (SSD)<\/li>\n<li>Power loss during writes<\/li>\n<li>Cable\/port issues causing persistent CRC errors<\/li>\n<li>Latent defects that the drive\u2019s firmware can\u2019t remap automatically<\/li>\n<\/ul>\n<div class=\"alert alert-info\" role=\"alert\">&#x1f4a1; <b>Important<\/b>: Software (including Disk Drill) cannot repair a physically bad sector. What it can do is work around it\u2014by retrying, skipping, or imaging around the defect to preserve what\u2019s still readable.<\/div>\n<h2><span class=\"ez-toc-section\" id=\"what_are_%e2%80%9cslow_read_blocks%e2%80%9d\"><\/span><b>What Are &#8220;Slow Read Blocks&#8221;?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A slow read block is an area that technically returns data but only after multiple ECC corrections and internal retries, which looks like multi\u2011second stalls during scans or imaging. These regions frequently precede fully unreadable sectors and can grind recovery to a halt. Disk Drill\u2019s <a href=\"\/help\/dmg-iso-backup.html\">Byte\u2011to\u2011Byte Backup<\/a> can skip slow zones so you can finalize an image without waiting days for marginal areas; you can revisit those zones later if needed.<\/p>\n<p><b>Why slow blocks matter<\/b><\/p>\n<ul>\n<li>They drag scans to a crawl, because the scanner waits through retry cycles.<\/li>\n<li>They increase thermal and mechanical stress on a marginal device.<\/li>\n<li>They waste recovery time that could be used to extract still-healthy data first.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"how_disk_drill_macos_manages_bad_blocks_under_the_hood\"><\/span><b>How Disk Drill (macOS) Manages Bad Blocks Under the Hood<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0423ou can always manually set memory sectors (or blocks) on your storage device as &#8220;bad&#8221; in Disk Drill following to &#8220;<b>\u0421ontext menu<\/b>&#8221; -&gt; &#8220;<b>Specify bad blocks<\/b>&#8221; on your device. Or vice versa, you can always manually remove the previous marks set by you or by Disk Drill automatically.<\/p>\n<p><img src=\"\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos.jpg\" alt=\"bad blocks management disk drill macos\" width=\"2000\" height=\"1125\" class=\"aligncenter size-full wp-image-19105 colorbox-7259\" srcset=\"https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos.jpg 2000w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-300x169.jpg 300w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-500x281.jpg 500w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-768x432.jpg 768w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-1536x864.jpg 1536w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/><\/p>\n<p>Disk Drill\u2019s scanning engine uses a <b>non\u2011destructive<\/b>, <b>software\u2011only bad\u2011block map<\/b> to keep recovery efficient:<\/p>\n<ul>\n<li>On the first failed read, the sector is marked as a candidate;<\/li>\n<li>If a second attempt also fails, it\u2019s recorded as bad inside Disk Drill; subsequent scans skip these addresses to avoid thrashing;<\/li>\n<li>When Disk Drill hits consecutive problematic sectors, it may mark ahead (a larger range) to regain scanning speed.\n<div class=\"alert alert-info\" role=\"alert\">&#x1f4a1; <b>Tip<\/b>: These marks live inside Disk Drill only (not on the disk) and are fully reversible.<\/div>\n<\/li>\n<\/ul>\n<div class=\"alert alert-secondary\" role=\"alert\">&#x1f6a8; <b>Availability<\/b>: The \u201cSpecify Bad Blocks\u201d editor (view\/add\/remove) and the bad\u2011sector import\/export workflow are documented for Disk Drill for macOS only. The Windows edition includes bad\u2011sector tolerance during scanning, but doesn\u2019t expose the same \u201cSpecify Bad Blocks\u201d UI.<\/div>\n<h3><span class=\"ez-toc-section\" id=\"how_the_bad_blocks_editor_works\"><\/span><b>How the Bad Blocks Editor Works<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The Bad Blocks editor lets you tell Disk Drill which parts of a drive to skip during scans, imaging, and recovery. The blue grid represents the whole disk; red squares are ranges you\u2019ve flagged as unreadable. These flags are non\u2011destructive\u2014they live only inside Disk Drill\u2014so you can remove them anytime and try those sectors again. This manual control is available in Disk Drill for macOS.<\/p>\n<p><img src=\"\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01.jpg\" alt=\"bad blocks management disk drill macos step 01\" width=\"2000\" height=\"1125\" class=\"aligncenter size-full wp-image-19106 colorbox-7259\" srcset=\"https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01.jpg 2000w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01-300x169.jpg 300w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01-500x281.jpg 500w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01-768x432.jpg 768w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-01-1536x864.jpg 1536w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/><\/p>\n<p><b>Key controls at a glance<\/b><\/p>\n<ul>\n<li><b>Click on the grid<\/b> \u2013 Instantly adds a bad block at the clicked location. Use this for quick, surgical marks when you notice problem spots.<\/li>\n<li><b>Add range<\/b> \u2013 Opens a dialog where you enter a Starting sector number and Number of sectors to mark a wide span (great for slow\u2011read regions or large unstable areas).<\/li>\n<li><b>Delete<\/b> \u2013 Select a row in the table and click Delete to remove that range from the skip list. This does not erase data; it simply allows Disk Drill to read those sectors again on the next pass.<\/li>\n<li><b>Scale slider<\/b> \u2013 Adjusts the zoom\/scale of the disk map so you can inspect fine details or get a big\u2011picture view of bad sectors across the drive.<\/li>\n<\/ul>\n<p>Once ranges are marked, Disk Drill skips them during read operations (scan, Byte\u2011to\u2011Byte backup, and recovery). This speeds things up and helps prevent macOS from unmounting unstable external drives. You can refine the map at any time and rerun the scan for additional data.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"managing_marks_reset_and_rescan_strategy\"><\/span><b>Managing Marks: Reset and Rescan Strategy<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Disk Drill stores its internal map of bad\/slow ranges per device\/scan context. You can:<\/p>\n<ul>\n<li><b>Keep the map<\/b> to accelerate future passes and avoid stalls.<\/li>\n<li><b>Clear the map<\/b> before another run to force Disk Drill to try those sectors again. This is useful if the drive has cooled down, if you changed cables\/ports, or after a successful disk image that reduced read stress.<\/li>\n<\/ul>\n<p>The sole purpose of this technique is to prevent endlessly long scans when the storage is lightly damaged or just doesn\u2019t operate properly, which might be a temporary issue. For example: you are scanning your external hard drive, Disk Drill locates bad sectors that don\u2019t read well, and the response from the hardware is so slow it may take days to scan even one megabyte of disk area. Disk Drill, in this case, will mark a few megabytes ahead of the last failed sectors and will proceed with scanning from there. A few sectors are skipped this way, but the chances to gain scanning speed are much higher. If the sectors at the advanced location are still \u201cbad\u201d, Disk Drill will do the same until it reaches the end of the storage area, or the healthy set of sectors.<\/p>\n<p>You may reset Disk Drill\u2019s stored data about bad sectors for a specific hard drive manually at any time by going to its \u201cSpecify bad blocks\u201d menu option. This may reset Disk Drill\u2019s alerts for that drive that may be popping out with a red \u201cissues\u201d label. If these alerts return when scanning this drive again, chances are, your drive has real physical issues.<\/p>\n<p>Also,\u00a0in case you can&#8217;t finish your scan due to the scanned drive or storage device (like a memory card) being\u00a0unexpectedly disconnected (unmounted) when scanning is active, and if it happens at a relatively the same scanning progress (always at 1-2 or 5%, for instance) over and over again, you could try to note the sector number from the last moment when the scan was active. For that, see\u00a0Disk Drill&#8217;s status messages when the scan is running in the following screenshot:<\/p>\n<p><img src=\"\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status.jpg\" alt=\"disk drill macos blocks status\" width=\"1800\" height=\"86\" class=\"border-gray border-radius-10 aligncenter wp-image-17990 size-full colorbox-7259\" srcset=\"https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status.jpg 1800w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status-300x14.jpg 300w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status-500x24.jpg 500w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status-768x37.jpg 768w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/disk-drill-macos-blocks-status-1536x73.jpg 1536w\" sizes=\"(max-width: 1800px) 100vw, 1800px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"importexport_bad_sectors_in_disk_drill\"><\/span><b>Import\/Export Bad Sectors in Disk Drill<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Disk Drill for macOS stores your bad\u2011sectors (bad blocks) maps as hidden files in your user Library. Backing them up lets you preserve skip lists for every drive you\u2019ve worked with; restoring them puts those maps back so scans, imaging, and recovery can use the same exclusions.<\/p>\n<div class=\"alert alert-info\" role=\"alert\">&#x1f4a1; <b>Tip<\/b>: These files are app data only. Copying or restoring them does not modify your drives.<\/div>\n<h4><b>Where Disk Drill Stores Bad\u2011sectors Data<\/b><\/h4>\n<p><img src=\"\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02.jpg\" alt=\"bad blocks management disk drill macos step 02\" width=\"2000\" height=\"1125\" class=\"aligncenter size-full wp-image-19108 colorbox-7259\" srcset=\"https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02.jpg 2000w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02-300x169.jpg 300w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02-500x281.jpg 500w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02-768x432.jpg 768w, https:\/\/www.cleverfiles.com\/help\/wp-content\/uploads\/2016\/10\/bad-blocks-management-disk-drill-macos-step-02-1536x864.jpg 1536w\" sizes=\"(max-width: 2000px) 100vw, 2000px\" \/><\/p>\n<div class=\"alert alert-secondary\" role=\"alert\">~\/Library\/Application Support\/DiskDrill\/<\/div>\n<p>Inside that folder you\u2019ll see hidden files named like:<\/p>\n<ul>\n<li><code>.actualBadBlocks_[DiskName]_[DiskUID]<\/code><\/li>\n<li><code>.proposedBadBlocks_[DiskName]_[DiskUID]<\/code><\/li>\n<\/ul>\n<p>You\u2019ll typically have one pair per device. The filename includes the drive name and a unique identifier.<\/p>\n<h4><b>How to Export (Back Up) the Bad\u2011sectors Database<\/b><\/h4>\n<ol>\n<li><b>Quit Disk Drill<\/b>. This prevents the app from rewriting files while you copy them.<\/li>\n<li><b>Open Finder \u2192 Go \u2192 Go to Folder\u2026<\/b> Paste this path and press Go:<br \/>\n\t<span class=\"copy-container\"><span class=\"copy-content bg-none\"><kbd>~\/Library\/Application Support\/DiskDrill\/<\/kbd><\/span><span class=\"copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" version=\"1.1\" x=\"0px\" y=\"0px\" viewBox=\"0 0 41.1 50.8\" style=\"enable-background:new 0 0 41.1 50.8;\" xml:space=\"preserve\"><path d=\"M31.1,20.7l-11-11.4c-0.6-0.6-1.3-0.9-2.1-0.9H2.9C1.3,8.4,0,9.7,0,11.3v36.6c0,1.6,1.3,2.9,2.9,2.9H29  c1.6,0,2.9-1.3,2.9-2.9V22.7C31.9,22,31.6,21.3,31.1,20.7z\"\/><path d=\"M40.3,12.3l-11-11.4C28.7,0.3,28,0,27.2,0H12.1c-1.6,0-2.9,1.3-2.9,2.9v2.5H18c1.6,0,3.2, 0.7, 4.3, 1.8l11,11.4  c1.1,1.1,1.6,2.6,1.6,4.1v19.7h3.2c1.6,0,2.9-1.3,2.9-2.9V14.4C41.1,13.6,40.8,12.9,40.3,12.3z\"\/><\/svg><\/span><\/span><\/p>\n<div class=\"alert alert-info\" role=\"alert\">&#x1f4a1; <b>Tip<\/b>: Can\u2019t see anything? Press <kbd>Command<\/kbd> + <kbd>Shift<\/kbd> + <kbd>.<\/kbd> to toggle hidden files.<\/div>\n<\/li>\n<li><b>Copy the files<\/b> that start with <code>.actualBadBlocks_*<\/code> and <code>.proposedBadBlocks_*<\/code> to a safe location (external drive, cloud folder, etc.).<\/li>\n<\/ol>\n<h4><b>How to Import (Restore) the Bad\u2011sectors Database<\/b><\/h4>\n<ol>\n<li>Quit Disk Drill if it\u2019s running.<\/li>\n<li>In Finder, open:<br \/>\n\t<span class=\"copy-container\"><span class=\"copy-content bg-none\"><kbd>~\/Library\/Application Support\/DiskDrill\/<\/kbd><\/span><span class=\"copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" version=\"1.1\" x=\"0px\" y=\"0px\" viewBox=\"0 0 41.1 50.8\" style=\"enable-background:new 0 0 41.1 50.8;\" xml:space=\"preserve\"><path d=\"M31.1,20.7l-11-11.4c-0.6-0.6-1.3-0.9-2.1-0.9H2.9C1.3,8.4,0,9.7,0,11.3v36.6c0,1.6,1.3,2.9,2.9,2.9H29  c1.6,0,2.9-1.3,2.9-2.9V22.7C31.9,22,31.6,21.3,31.1,20.7z\"\/><path d=\"M40.3,12.3l-11-11.4C28.7,0.3,28,0,27.2,0H12.1c-1.6,0-2.9,1.3-2.9,2.9v2.5H18c1.6,0,3.2, 0.7, 4.3, 1.8l11,11.4  c1.1,1.1,1.6,2.6,1.6,4.1v19.7h3.2c1.6,0,2.9-1.3,2.9-2.9V14.4C41.1,13.6,40.8,12.9,40.3,12.3z\"\/><\/svg><\/span><\/span><\/li>\n<li>Copy your backup files (<code>.actualBadBlocks_*<\/code> and <code>.proposedBadBlocks_*<\/code>) back into that folder.<\/li>\n<li>Relaunch Disk Drill.<\/li>\n<\/ol>\n<h3 id=\"specify-bad-blocks-not-available\"><span class=\"ez-toc-section\" id=\"why_the_%e2%80%9cspecify_bad_blocks%e2%80%9d_option_isnt_available\"><\/span><b>Why the &#8220;Specify Bad Blocks&#8221; Option Isn\u2019t Available<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The Specify Bad Blocks editor appears only when you select a device type that Disk Drill can map directly to physical sector addresses. That means:<\/p>\n<p><b>It does appear for<\/b><\/p>\n<ul>\n<li>Physical disks (the top\u2011level device, e.g., \u201cSamsung PSSD T7 Media\u201d).<\/li>\n<\/ul>\n<p><b>It doesn\u2019t appear for<\/b><\/p>\n<ul>\n<li>Logical items such as APFS containers\/volumes, partitions, or mounted disk images (.dmg, .img, .dd).<\/li>\n<li><a href=\"\/help\/fusion-drive-disk-drill-mac.html\">CoreStorage \/ Fusion Drive<\/a> virtual disks (the top entry inside the CoreStorage\/Fusion group).<\/li>\n<li>Other virtual layers that don\u2019t have a 1:1 link to the underlying physical sectors.<\/li>\n<\/ul>\n<p><b>Why<\/b>: Logical\/virtual volumes typically aren\u2019t directly tied to the physical LBAs. Marking a sector range on the physical disk won\u2019t automatically propagate to those virtual layers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"limitations_truths_no_marketing_fluff\"><\/span><b>Limitations &#038; Truths (No Marketing Fluff)<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><b>This does not fix media<\/b>. Marking sectors in Disk Drill is advisory for scanning logic, not a repair.<\/li>\n<li><b>Reallocation is firmware-controlled<\/b>. You can\u2019t force a healthy remap from user space.<\/li>\n<li><b>SSDs behave differently<\/b>. After TRIM and garbage collection, wiped pages are truly gone; rescanning won\u2019t bring them back. The slow-block workflow mainly helps before purge or on HDDs.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"faq\"><\/span><b>FAQ<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div><section itemscope=\"\" itemtype=\"https:\/\/schema.org\/FAQPage\">\n<div style=\"border-bottom: 00px solid rgb(213, 217, 217);\" class=\"panel panel-default faq-block\" itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Question\" role=\"tablist\">\r\n            <div class=\"panel-heading\" role=\"tab\" id=\"heading1\">\r\n                <div class=\"panel-title\" itemprop=\"name\">\r\n                    <a class=\"toggle-link transition-all collapsed\" role=\"button\" data-toggle=\"collapse\" href=\"#collapse-item-1\" aria-expanded=\"false\" aria-controls=\"collapse-item-1\"><h3 class=\"panel-title\"><span class=\"ez-toc-section\" id=\"does_disk_drill_repair_bad_sectors\"><\/span>Does Disk Drill repair bad sectors?<span class=\"ez-toc-section-end\"><\/span><\/h3>    \r\n\t\t\t\t\t\t    <span class=\"faq-toggle-icon\"><\/span>\r\n                   <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            <div id=\"collapse-item-1\" class=\"panel-collapse collapse\" role=\"tabpanel\" aria-labelledby=\"heading1\" aria-expanded=\"false\" style=\"\">\r\n              <div class=\"panel-body\" itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Answer\">\r\n<div itemprop=\"text\">\r\n                <p>No. It optimizes how scans proceed around defective areas and lets you decide when to re-try them.<\/p>\r\n<\/div>\r\n                <div class=\"clearfix\"><\/div>\r\n              <\/div>\r\n            <\/div>\r\n<\/div>\n<div style=\"border-bottom: 00px solid rgb(213, 217, 217);\" class=\"panel panel-default faq-block\" itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Question\" role=\"tablist\">\r\n            <div class=\"panel-heading\" role=\"tab\" id=\"heading2\">\r\n                <div class=\"panel-title\" itemprop=\"name\">\r\n                    <a class=\"toggle-link transition-all collapsed\" role=\"button\" data-toggle=\"collapse\" href=\"#collapse-item-2\" aria-expanded=\"false\" aria-controls=\"collapse-item-2\"><h3 class=\"panel-title\"><span class=\"ez-toc-section\" id=\"will_marking_sectors_as_bad_risk_data_loss\"><\/span>Will marking sectors as bad risk data loss?<span class=\"ez-toc-section-end\"><\/span><\/h3>    \r\n\t\t\t\t\t\t    <span class=\"faq-toggle-icon\"><\/span>\r\n                   <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            <div id=\"collapse-item-2\" class=\"panel-collapse collapse\" role=\"tabpanel\" aria-labelledby=\"heading2\" aria-expanded=\"false\" style=\"\">\r\n              <div class=\"panel-body\" itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Answer\">\r\n<div itemprop=\"text\">\r\n                <p>No. The marks exist inside Disk Drill only. They don\u2019t modify the disk or file system.<\/p>\r\n<\/div>\r\n                <div class=\"clearfix\"><\/div>\r\n              <\/div>\r\n            <\/div>\r\n<\/div>\n<div style=\"border-bottom: 00px solid rgb(213, 217, 217);\" class=\"panel panel-default faq-block\" itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Question\" role=\"tablist\">\r\n            <div class=\"panel-heading\" role=\"tab\" id=\"heading3\">\r\n                <div class=\"panel-title\" itemprop=\"name\">\r\n                    <a class=\"toggle-link transition-all collapsed\" role=\"button\" data-toggle=\"collapse\" href=\"#collapse-item-3\" aria-expanded=\"false\" aria-controls=\"collapse-item-3\"><h3 class=\"panel-title\"><span class=\"ez-toc-section\" id=\"is_this_available_on_windows\"><\/span>Is this available on Windows?<span class=\"ez-toc-section-end\"><\/span><\/h3>    \r\n\t\t\t\t\t\t    <span class=\"faq-toggle-icon\"><\/span>\r\n                   <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            <div id=\"collapse-item-3\" class=\"panel-collapse collapse\" role=\"tabpanel\" aria-labelledby=\"heading3\" aria-expanded=\"false\" style=\"\">\r\n              <div class=\"panel-body\" itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Answer\">\r\n<div itemprop=\"text\">\r\n                <p>This bad\/slow block management workflow is available only in Disk Drill for macOS.<\/p>\r\n<\/div>\r\n                <div class=\"clearfix\"><\/div>\r\n              <\/div>\r\n            <\/div>\r\n<\/div>\n<div style=\"border-bottom: 01px solid rgb(213, 217, 217);\" class=\"panel panel-default faq-block\" itemprop=\"mainEntity\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Question\" role=\"tablist\">\r\n            <div class=\"panel-heading\" role=\"tab\" id=\"heading4\">\r\n                <div class=\"panel-title\" itemprop=\"name\">\r\n                    <a class=\"toggle-link transition-all collapsed\" role=\"button\" data-toggle=\"collapse\" href=\"#collapse-item-4\" aria-expanded=\"false\" aria-controls=\"collapse-item-4\"><h3 class=\"panel-title\"><span class=\"ez-toc-section\" id=\"why_does_my_scan_crawl_even_with_few_%e2%80%9cbad%e2%80%9d_sectors\"><\/span>Why does my scan crawl even with few \u201cbad\u201d sectors?<span class=\"ez-toc-section-end\"><\/span><\/h3>    \r\n\t\t\t\t\t\t    <span class=\"faq-toggle-icon\"><\/span>\r\n                   <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            <div id=\"collapse-item-4\" class=\"panel-collapse collapse\" role=\"tabpanel\" aria-labelledby=\"heading4\" aria-expanded=\"false\" style=\"\">\r\n              <div class=\"panel-body\" itemprop=\"acceptedAnswer\" itemscope=\"\" itemtype=\"http:\/\/schema.org\/Answer\">\r\n<div itemprop=\"text\">\r\n                <p>Because slow read blocks can be just as time\u2011consuming as unreadable ones. Use Disk Drill\u2019s <a href=\"\/help\/dmg-iso-backup.html\">Byte\u2011to\u2011Byte Backup<\/a> to skip slow zones and complete an image sooner, then target problematic ranges later.<\/p>\r\n<\/div>\r\n                <div class=\"clearfix\"><\/div>\r\n              <\/div>\r\n            <\/div>\r\n<\/div>\n<\/section><\/div>\n","protected":false},"excerpt":{"rendered":"<p>During a scan, Disk Drill\u2019s data\u2011recovery power engine may temporarily flag certain sectors as bad (also called bad blocks) when repeated read attempts fail. This helps keep the scan fast by skipping unstable areas that would otherwise stall progress. These [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,5],"tags":[],"class_list":{"0":"post-7259","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-understanding","7":"category-recovery"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Managing Bad Sectors in Disk Drill for macOS \u2014 Bad Blocks &amp; Slow Read Blocks Explained<\/title>\n<meta name=\"description\" content=\"Learn what bad blocks and slow read blocks are, how Disk Drill for macOS handles them, and the safest, fastest workflow for imaging and recovery. 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