{"id":48823,"date":"2020-01-15T05:56:01","date_gmt":"2020-01-15T05:56:01","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=48823"},"modified":"2024-12-27T06:50:45","modified_gmt":"2024-12-27T06:50:45","slug":"common-symptoms-of-raid-array-failures","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/common-symptoms-of-raid-array-failures\/","title":{"rendered":"What Are Some Common Symptoms of RAID Array Failures?"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>RAID arrays are quite robust and reliable\ndata storage solution to store business data and run critical business tasks or\napplications without any problem. However, the mechanical nature of hard drives\nmakes RAID configuration prone to failure. A RAID may break or become\ninaccessible due to one or more disk failure or related errors&mdash;leading to significant\ndata loss and downtime. <\/p><p>Other errors such as human errors, controller\nfailure, abrupt shutdown, power loss, or power surge, etc. could also break or\ncorrupt a RAID array and cause partition loss. <\/p><h2 class=\"wp-block-heading\" id=\"symptoms-of-raid-failure\"><strong>Symptoms of RAID Failure<\/strong><\/h2><p>Symptoms of RAID failures are closely related to symptoms of the hard drive failure that are used in the RAID array. The chances of a RAID server failure can be easily analyzed by checking the condition and performance of the associated RAID disks by using an open-source tool like CrystalDiskInfo. <\/p><p>Beside RAID disks, there are a few other symptoms\nof RAID failure that you may observe when a RAID is about to fail. These include,\n<\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>1. RAID Partition Loss<\/strong><\/p><p>RAID partition loss may\nhappen due to virus or malware intrusion, which can corrupt the header of a\nRAID partition and make it disappear. Other factors, such as power surge,\nhardware or software errors, bad sectors, can also cause partition loss.<\/p><p>Sometimes, replacing a\nfailed RAID drive incorrectly in a RAID array may lead to partition loss. <\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>2. Frequent Read\/ Write Errors<\/strong><\/p><p>If you are experiencing\nfrequent read\/write errors while accessing or transferring data from RAID, it\nindicates an underlying problem with your RAID array that may lead to data\nloss.<\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>3. Data Corruption<\/strong><\/p><p>Data corruption may occur\ndue to bad sectors that appear on the disk with time and usage. A RAID array\nwith older or ageing drives may fail to reallocate bad sectors, which can lead\nto data corruption and RAID failure. <\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>4. RAID Server Crash<\/strong><\/p><p>A RAID server may crash\ndue to failing drive, software error, and a problem with the RAID controller. &nbsp;<\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>5. RAID Controller Errors <\/strong><\/p><p>A hardware RAID controller may show errors due to problems with the hard drive or after RAID rebuild if the new drive is added to the array incorrectly. The system may fail to detect RAID partitions. In such a case, changing to a new RAID controller doesn&rsquo;t work as RAID metadata is typically tied to the particular RAID controller. <\/p><h2 class=\"wp-block-heading\" id=\"how-to-reconstruct-a-failed-raid-array-without-data-loss\"><strong>How to Reconstruct a Failed RAID Array without Data Loss<\/strong><\/h2><p>If a RAID (RAID 0, 5, or 6) server fails,\nbreaks or shows errors, follow the steps mentioned below to reconstruct the\nRAID and recover data safely.<\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>Step 1: Precautions<\/strong><\/p><ul class=\"wp-block-list\">\n<li>Never run CHKDSK command on a\nRAID array to fix RAID errors or after RAID crash<\/li>\n\n\n\n<li>Do not change the disk order in\nthe array<\/li>\n\n\n\n<li>Do not attempt to rebuild a\nRAID 5 or RAID 6 array with more than one disk failure<\/li>\n\n\n\n<li>Do not attempt any hit &amp;\ntrial methods, especially if you don&rsquo;t know what you are doing <\/li>\n<\/ul><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>Step 2: Backup Data<\/strong><\/p><p>Before anything else, backup data from the\nRAID server, if it&rsquo;s accessible. Backup is critical. For instance, in a RAID 5\narray, if a disk has failed, the RAID enters into degraded mode and loses its\nfault-tolerance. In such a case, immediately back up your data from the RAID\nbefore replacing the failed RAID drive to avoid multiple disk failure.<\/p><p class=\"has-very-light-gray-background-color has-background\"><strong>IMPORTANT NOTE:<\/strong><em> RAIDs are not backup or an alternative to backups. RAIDs do fail and may cause permanent data loss, sometimes beyond recovery.<\/em><\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>Step 3: Check the Drive Health Status<\/strong><\/p><p>Use a tool such as CrystalDiskInfo to check the SMART status of RAID disks. For better and deeper insights about the disk, install the demo version of<em> <a href=\"https:\/\/www.stellarinfo.com\/windows-raid-recovery.php\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Stellar Data Recovery Technician<\/strong><\/a> <\/em>and go to <em>More Tools&gt;Drive Monitor<\/em>.<\/p><p>The Drive Monitor displays overall disk health,\nperformance, temperature, and SMART status of the disk. If the health is poor\nor SMART shows warnings, use &lsquo;<em>Clone Disk<\/em>&rsquo;\noption to clone your RAID disk. <\/p><p class=\"has-vivid-red-color has-very-light-gray-background-color has-text-color has-background\"><strong>Step 4: Reconstruct Broken, Corrupt, or Inaccessible RAID Server for Recovery<\/strong><\/p><p>To reconstruct a failed RAID and recover data safely, you need an advanced RAID drives data recovery software such as <strong><a href=\"https:\/\/www.stellarinfo.com\/windows-raid-recovery.php\" target=\"_blank\" rel=\"noreferrer noopener\">Stellar Data Recovery Technician<\/a><\/strong>.    The software recovers lost, deleted, and formatted data from any Windows-based RAID 0, RAID 5, and RAID 6 server. Install the software on your Windows machine and then follow these steps:<\/p><ul class=\"wp-block-list\">\n<li>Connect all RAID drives to a Windows PC by using SATA connector or SATA to USB converter cables. <\/li>\n\n\n\n<li>Launch <em>Stellar Data Recovery Technician<\/em> software<\/li>\n\n\n\n<li>Select &lsquo;All Data&rsquo; and click &lsquo;<strong>Next.<\/strong>&rsquo;<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"apply-gradient-on-post-images\" src=\"https:\/\/www.stellarinfo.com\/public\/image\/catalog\/screenshot\/wdr-tech\/1-stellar-data-recovery-technician-select-data-type.png\" alt=\"\"><\/figure><p class=\"has-very-light-gray-background-color has-background\"><strong><em>Tip: <\/em><\/strong><em>Check the list of supported\nfile types via Settings&gt;File List. To add a new file type or format, click\n&lsquo;Add Header&rsquo; tab and add a few sample files of the particular file format that\nyou want to recover. <\/em><\/p><ul class=\"wp-block-list\">\n<li>Select &lsquo;<strong>RAID Recovery<\/strong>&rsquo; and click &lsquo;<strong>Scan.<\/strong>&rsquo;<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img decoding=\"async\" class=\"apply-gradient-on-post-images\" src=\"https:\/\/www.stellarinfo.com\/public\/image\/catalog\/screenshot\/wdr-tech\/2-stellar-data-recovery-technician-select-location.png\" alt=\"\"><\/figure><ul class=\"wp-block-list\">\n<li>Select the RAID 0, RAID 5, or RAID 6 tab, whichever RAID you had and want to rebuild for recovery<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"455\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-2-3.png\" alt=\"Stellar\" class=\"wp-image-73957 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-2-3.png 600w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-2-3-300x228.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Enter and select the required RAID\nparameters from the respective options. You need to provide all the parameters.\n<\/li>\n<\/ul><p class=\"has-very-light-gray-background-color has-background\"><strong>TIP: <\/strong>In case you forgot the parameter values, choose &lsquo;<strong>Don&rsquo;t know<\/strong>&rsquo; options from the drop-down\nand select probable values<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" class=\"apply-gradient-on-post-images\" src=\"https:\/\/www.stellarinfo.com\/public\/image\/catalog\/screenshot\/wdr-tech\/4-stellar-data-recovery-technician-enter-parameters.png\" alt=\"https:\/\/www.stellarinfo.com\/onlinehelp\/wp-content\/uploads\/2019\/11\/44-raid-5.png\"><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Click on the &lsquo;<strong>Rebuild RAID<\/strong>&rsquo; button. Based on provided\nand selected RAID parameters, the software intelligently reconstructs a virtual\nRAID array and lists the RAID volumes for data recovery scan<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"622\" height=\"417\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2020\/01\/1.png\" alt=\"https:\/\/www.stellarinfo.com\/onlinehelp\/wp-content\/uploads\/2019\/11\/46.png\" class=\"wp-image-48825 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2020\/01\/1.png 622w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2020\/01\/1-300x201.png 300w\" sizes=\"auto, (max-width: 622px) 100vw, 622px\" \/><\/figure><p>If provided RAID parameters are incorrect,\nthe software automatically detects and reconstructs a few probable virtual RAIDs\nfor data recovery.<\/p><ul class=\"wp-block-list\">\n<li>Choose the reconstructed RAID virtual drive or volume from the list and click &lsquo;<strong>Scan.<\/strong>&rsquo;<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"423\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-4-5.png\" alt=\"Stellar\" class=\"wp-image-73958 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-4-5.png 600w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/raid-known-4-5-300x212.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>After the scan, click &lsquo;<strong>Click Here<\/strong>&rsquo; link at the bottom to run a deep scan<\/li>\n\n\n\n<li>Post deep scan, you may click on a file to see its preview before saving. This helps identify the file you need to recover<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"620\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/15_Scan-completed-1.png\" alt=\"Stellar\" class=\"wp-image-73959 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/15_Scan-completed-1.png 880w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/15_Scan-completed-1-300x211.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/15_Scan-completed-1-768x541.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Select the files you wish to save and click &lsquo;<strong>Recover.<\/strong>&rsquo;<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"620\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/17_Destination-6.png\" alt=\"Stellar\" class=\"wp-image-73960 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/17_Destination-6.png 880w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/17_Destination-6-300x211.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/17_Destination-6-768x541.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Click &lsquo;Browse&rsquo; to select a save location and click &lsquo;<strong>Start Saving.<\/strong>&rsquo;<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"620\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/19_Saving-Data-4.png\" alt=\"Stellar\" class=\"wp-image-73961 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/19_Saving-Data-4.png 880w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/19_Saving-Data-4-300x211.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/02\/19_Saving-Data-4-768x541.png 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n<\/div><p class=\"has-very-light-gray-background-color has-background\"><strong>WARNING: <\/strong><em>Never select any RAID disk, which is a part of the reconstructed RAID array, to save recovered data. Get a separate external disk(s) to save the recovered files and avoid data overwriting?<\/em><\/p><h2 class=\"wp-block-heading\" id=\"raid-failure-prevention-tip\"><strong>RAID Failure Prevention Tip<\/strong><\/h2><p>The most common reasons for RAID failure\nare hard disk errors and human errors. However, with regular backup and\nadequate measures (discussed below), you can avoid data loss due to RAID\nfailure. <\/p><ul class=\"wp-block-list\">\n<li>Monitor of RAID disk drives&rsquo;\ncritical SMART parameters, health status, and temperature can help you minimize\nthe risk of RAID failures to a great extent. <\/li>\n<\/ul><p>By monitoring and\nanalyzing RAID disk health, you can take appropriate &amp; time-bound measures\nto backup data from your RAID array and safely replace the failing disk with a\nnew without breaking the RAID configuration or risk of data loss<\/p><ul class=\"wp-block-list\">\n<li>Avoid CHKDSK or Disk Repair utilities to fix RAID errors<\/li>\n\n\n\n<li>Never install beta update of a RAID firmware, system software, or operating system<\/li>\n\n\n\n<li>Always update operating system and software to the latest stable version<\/li>\n\n\n\n<li>Ensure uninterrupted power supply to RAID controller<\/li>\n\n\n\n<li>Keep at least two new\/empty drives available all the time. That will help you replace the failed RAID drive quickly and avoid downtimes and data loss<\/li>\n<\/ul><p>If you have any queries or suggestions regarding RAID data recovery, leave them in the comment section below. You may also reach us via call, chat, or email for more help. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>RAID arrays are quite robust and reliable data storage solution to store&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/common-symptoms-of-raid-array-failures\/\">Continue reading <span class=\"screen-reader-text\">What Are Some Common Symptoms of RAID Array Failures?<\/span><\/a><\/p>\n","protected":false},"author":59,"featured_media":48830,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[803],"tags":[],"class_list":["post-48823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-raid-data-recovery","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Are Some Common Symptoms of RAID Array Failures? 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