{"id":522,"date":"2022-11-30T15:20:53","date_gmt":"2022-11-30T15:20:53","guid":{"rendered":"https:\/\/data-recovery.gr\/?page_id=522"},"modified":"2024-04-02T10:03:30","modified_gmt":"2024-04-02T10:03:30","slug":"katerrefse-systoichia-raid","status":"publish","type":"page","link":"https:\/\/data-recovery.gr\/en\/case-studies\/katerrefse-systoichia-raid\/","title":{"rendered":"Collapsed RAID Array"},"content":{"rendered":"
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The RAID array has collapsed - Case 71202<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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5*72.8GB HP SCSI model MAW3073NC ULTRA320 in RAID5 array.
Symptoms:<\/strong> RAID 5 collapsed.<\/span>
<\/span>Causes:<\/strong> Drives 0 and 3 have failed.<\/span>
<\/span>Background:<\/strong> The array got degraded without a notice.<\/span><\/p>

Resolution:<\/strong>\u00a0Despite the fact that RAID5 has a 1-drive fault tolerance, in this case two drives have failed, so the entire array collapsed. This incident happened without the server administrator to take notice.
Drives 0 and 3 developed bad sectors.\u00a0<\/p>

All drives have been imaged to their maximum extent. A virtual RAID has been created with the drive images. Special attention has been paid to the RAID parameters, since the HP arrays always use delay feature, while sometimes the offset is at 2088.<\/p>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\u00a0<\/strong><\/p>

Percentage or recovery: 100%.<\/strong><\/p>\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<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

\u0394\u03b5\u03bd \u03b1\u03bd\u03b1\u03b3\u03bd\u03c9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03b7 \u03a3\u03c5\u03c3\u03c4\u03bf\u03b9\u03c7\u03af\u03b1 RAID – \u03a5\u03c0\u03cc\u03b8\u03b5\u03c3\u03b7 71202 \u03a3\u03ba\u03bb\u03b7\u03c1\u03bf\u03af \u03b4\u03af\u03c3\u03ba\u03bf\u03b9 \u0397\u03a1 5*72.8GB SCSI \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf MAW3073NC ULTRA320 \u03c3\u03b5 RAID5.\u03a3\u03c5\u03bc\u03c0\u03c4\u03ce\u03bc\u03b1\u03c4\u03b1: To RAID 5 \u03ba\u03b1\u03c4\u03ad\u03c1\u03c1\u03b5\u03c5\u03c3\u03b5.\u0391\u03af\u03c4\u03b9\u03b1: \u03a3\u03c6\u03ac\u03bb\u03bc\u03b1 \u03c4\u03c9\u03bd \u03b4\u03af\u03c3\u03ba\u03c9\u03bd 0 \u03ba\u03b1\u03b9 3.\u0399\u03c3\u03c4\u03bf\u03c1\u03b9\u03ba\u03cc: \u0397 \u03c3\u03c5\u03c3\u03c4\u03bf\u03b9\u03c7\u03af\u03b1 \u03ad\u03b3\u03b9\u03bd\u03b5 degrade \u03c7\u03c9\u03c1\u03af\u03c2 \u03bd\u03b1 \u03b3\u03af\u03bd\u03b5\u03b9 \u03b1\u03bd\u03c4\u03b9\u03bb\u03b7\u03c0\u03c4\u03cc \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03b9\u03c3\u03c4\u03ae \u03c4\u03bf\u03c5 \u03c3\u03c5\u03c3\u03c4\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2. \u0395\u03c0\u03af\u03bb\u03c5\u03c3\u03b7:\u00a0\u03a0\u03b1\u03c1\u03cc\u03bb\u03bf \u03c0\u03bf\u03c5 \u03c4\u03bf RAID5 \u03b4\u03af\u03bd\u03b5\u03b9 fail tolerance \u03b5\u03bd\u03cc\u03c2 \u03b4\u03af\u03c3\u03ba\u03bf\u03c5, \u03c3\u03c4\u03b7\u03bd \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03c0\u03b5\u03c1\u03af\u03c0\u03c4\u03c9\u03c3\u03b7 \u03ba\u03b1\u03c4\u03ad\u03c1\u03c1\u03b5\u03c5\u03c3\u03b1\u03bd \u03b4\u03cd\u03bf… Read More »Collapsed RAID Array<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"parent":497,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/template-pagebuilder-full-width.php","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":100,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"class_list":["post-522","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/pages\/522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/comments?post=522"}],"version-history":[{"count":43,"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/pages\/522\/revisions"}],"predecessor-version":[{"id":1070,"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/pages\/522\/revisions\/1070"}],"up":[{"embeddable":true,"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/pages\/497"}],"wp:attachment":[{"href":"https:\/\/data-recovery.gr\/en\/wp-json\/wp\/v2\/media?parent=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}