{"id":15796,"date":"2013-12-11T09:14:26","date_gmt":"2013-12-11T09:14:26","guid":{"rendered":"https:\/\/aidanfinn.com\/?p=15796"},"modified":"2013-12-11T09:14:26","modified_gmt":"2013-12-11T09:14:26","slug":"kb2898774-data-loss-occurs-on-scsi-disk-that-turns-off-in-ws2012-based-failover-cluster","status":"publish","type":"post","link":"https:\/\/aidanfinn.com\/?p=15796","title":{"rendered":"KB2898774 &#8211; Data Loss Occurs On SCSI Disk That Turns Off In WS2012-Based Failover Cluster"},"content":{"rendered":"<p>Microsoft has <a href=\"http:\/\/support.microsoft.com\/kb\/2898774\" target=\"_blank\">released<\/a> a KB article to avoid data loss occurring when a SCSI disk turns off in a Windows Server 2012-based failover cluster.<\/p>\n<blockquote><p><strong><span style=\"text-decoration: underline;\">Symptoms<\/span><\/strong><\/p>\n<p>Consider the following scenario:<\/p>\n<ul>\n<li>You deploy a Windows Server 2012-based failover cluster. The cluster contains two nodes (node A and node B).<\/li>\n<li>A SCSI disk is used for the failover cluster. The disk is a shared disk and is accessible by both node A and node B.<\/li>\n<li>Node A restarts or crashes. Then, the cluster fails over to node B.<\/li>\n<li>Node A comes back online.<\/li>\n<li>Node B is shut down and the cluster fails over to node A.<\/li>\n<li>You write some data to the disk.<\/li>\n<li>The disk turns off unexpectedly. For example, the device losses power.<\/li>\n<\/ul>\n<p>In this scenario, the data that you write to the disk is lost.<br \/>\n<b>Notes<\/b><\/p>\n<ul>\n<li>This issue also occurs when the cluster contains more than two nodes.<\/li>\n<li>This issue does not occur if the SCSI disk supports the SCSI Primary Commands &#8211; 4 (SPC-4) standard.<\/li>\n<\/ul>\n<\/blockquote>\n<p>To resolve this issue, install update rollup <a href=\"http:\/\/support.microsoft.com\/kb\/2903938\" target=\"_blank\">2903938<\/a>.\u00a0 It\u2019s an update rollup, so update rollup rules apply \u2013 either test like nuts in a lab or wait a month before you approve\/deploy it.<\/p>\n<div class=\"wlWriterEditableSmartContent\" id=\"scid:0767317B-992E-4b12-91E0-4F059A8CECA8:5383b300-9d8b-44a6-904c-0f9a0f95c209\" style=\"float: none; margin: 0px; display: inline; padding: 0px;\">Technorati Tags: <a href=\"http:\/\/technorati.com\/tags\/Windows+Server+2012\" rel=\"tag\">Windows Server 2012<\/a>,<a href=\"http:\/\/technorati.com\/tags\/Failover+Clustering\" rel=\"tag\">Failover Clustering<\/a>,<a href=\"http:\/\/technorati.com\/tags\/Storage\" rel=\"tag\">Storage<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft has released a KB article to avoid data loss occurring when a SCSI disk turns off in a Windows Server 2012-based failover cluster. Symptoms Consider the following scenario: You deploy a Windows Server 2012-based failover cluster. The cluster contains two nodes (node A and node B). A SCSI disk is used for the failover &hellip; <a href=\"https:\/\/aidanfinn.com\/?p=15796\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;KB2898774 &#8211; Data Loss Occurs On SCSI Disk That Turns Off In WS2012-Based Failover Cluster&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[52],"tags":[63,99,118],"class_list":["post-15796","post","type-post","status-publish","format-standard","hentry","category-windows-server","tag-failover-clustering","tag-storage","tag-windows-server-2012"],"aioseo_notices":[],"jetpack_featured_media_url":"","amp_enabled":true,"_links":{"self":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/15796","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15796"}],"version-history":[{"count":0,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=\/wp\/v2\/posts\/15796\/revisions"}],"wp:attachment":[{"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15796"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15796"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aidanfinn.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}