{"id":286,"date":"2006-10-02T10:35:00","date_gmt":"2006-10-02T17:35:00","guid":{"rendered":"http:\/\/www.pdxtc.com\/wpblog\/archives\/286"},"modified":"2014-12-04T13:45:50","modified_gmt":"2014-12-04T20:45:50","slug":"raid-hard-drive-arrays-made-simple","status":"publish","type":"post","link":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/","title":{"rendered":"RAID Hard Drive Arrays Made Simple"},"content":{"rendered":"

Someone sent me this illustrated RAID example<\/a> that I just had to share… \ud83d\ude09<\/p>\n

The RAID (R<\/strong>edundant A<\/strong>rray of I<\/strong>ndependent<\/em><\/span> D<\/strong>isks<\/em><\/span>) <\/em><\/span>defintions below are from WikiPedia<\/a>, and they’re pretty good…<\/p>\n

There are number of different RAID levels:<\/span><\/p>\n

\n
  • Level 0 — Striped Disk Array without Fault Tolerance:<\/strong> Provides data striping<\/em> (spreading out blocks of each file across multiple disk drives) but no redundancy. This improves performance but does not deliver fault tolerance. If one drive fails then all data<\/a> in the array is lost.<\/li>\n
  • Level 1 — Mirroring and Duplexing:<\/strong> Provides disk mirroring<\/a>. Level 1 provides twice the read transaction rate of single disks and the same write transaction rate as single disks.<\/li>\n
  • Level 2 — Error-Correcting Coding:<\/strong> Not a typical implementation and rarely used, Level 2 stripes data at the bit level rather than the block level.<\/li>\n
  • Level 3 — Bit-Interleaved Parity:<\/strong> Provides byte-level striping with a dedicated parity disk. Level 3, which cannot service simultaneous multiple requests, also is rarely used.<\/li>\n
  • Level 4 — Dedicated Parity Drive:<\/strong> A commonly used implementation of RAID, Level 4 provides block-level striping (like Level 0) with a parity disk. If a data disk fails, the parity data is used to create a replacement disk. A disadvantage to Level 4 is that the parity disk can create write bottlenecks.<\/li>\n
  • Level 5 — Block Interleaved Distributed Parity:<\/strong> Provides data striping at the byte level and also stripe error correction information. This results in excellent performance and good fault tolerance. Level 5 is one of the most popular implementations of RAID.<\/li>\n
  • Level 6 — Independent Data Disks with Double Parity:<\/strong> Provides block-level striping with parity data distributed across all disks.<\/li>\n
  • Level 0+1 \u00e2\u20ac\u201c A Mirror of Stripes:<\/strong> Not one of the original RAID levels, two RAID 0 stripes are created, and a RAID 1 mirror is created over them. Used for both replicating and sharing data among disks.<\/li>\n
  • Level 10 \u00e2\u20ac\u201c A Stripe of Mirrors:<\/strong> Not one of the original RAID levels, multiple RAID 1 mirrors are created, and a RAID 0 stripe is created over these.<\/li>\n
  • Level 7:<\/strong> A trademark of Storage<\/a> Computer Corporation that adds caching to Levels 3 or 4.<\/li>\n
  • RAID S<\/strong>: EMC Corporation’s proprietary striped parity RAID system<\/a> used in its Symmetrix storage systems.<\/li>\n<\/menu>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

    Someone sent me this illustrated RAID example that I just had to share… \ud83d\ude09 The RAID (Redundant Array of Independent Disks) defintions below are from WikiPedia, and they’re pretty good… There are number of different RAID levels: Level 0 — Striped Disk Array without Fault Tolerance: Provides data striping (spreading out blocks of each file […]<\/p>\n","protected":false},"author":76,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-286","post","type-post","status-publish","format-standard","hentry","category-computers-how-to"],"yoast_head":"\nRAID Hard Drive Arrays Made Simple<\/title>\n<meta name=\"description\" content=\"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"RAID Hard Drive Arrays Made Simple\" \/>\n<meta property=\"og:description\" content=\"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/\" \/>\n<meta property=\"og:site_name\" content=\"Scott Hendison's Old Search Commander Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SearchCommander\" \/>\n<meta property=\"article:published_time\" content=\"2006-10-02T17:35:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-12-04T20:45:50+00:00\" \/>\n<meta name=\"author\" content=\"Scott\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@shendison\" \/>\n<meta name=\"twitter:site\" content=\"@shendison\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Scott\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/\"},\"author\":{\"name\":\"Scott\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/#\\\/schema\\\/person\\\/3142c7d28dc676725ac62cd6c9de8371\"},\"headline\":\"RAID Hard Drive Arrays Made Simple\",\"datePublished\":\"2006-10-02T17:35:00+00:00\",\"dateModified\":\"2014-12-04T20:45:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/\"},\"wordCount\":352,\"commentCount\":0,\"articleSection\":[\"Computers - How to\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/\",\"url\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/\",\"name\":\"RAID Hard Drive Arrays Made Simple\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/#website\"},\"datePublished\":\"2006-10-02T17:35:00+00:00\",\"dateModified\":\"2014-12-04T20:45:50+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/#\\\/schema\\\/person\\\/3142c7d28dc676725ac62cd6c9de8371\"},\"description\":\"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/computers-how-to\\\/raid-hard-drive-arrays-made-simple\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"RAID Hard Drive Arrays Made Simple\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/#website\",\"url\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/\",\"name\":\"Scott Hendison's Old Search Commander Blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.pdxtc.com\\\/wpblog\\\/#\\\/schema\\\/person\\\/3142c7d28dc676725ac62cd6c9de8371\",\"name\":\"Scott\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g\",\"caption\":\"Scott\"},\"sameAs\":[\"https:\\\/\\\/x.com\\\/shendison\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"RAID Hard Drive Arrays Made Simple","description":"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/","og_locale":"en_US","og_type":"article","og_title":"RAID Hard Drive Arrays Made Simple","og_description":"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from","og_url":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/","og_site_name":"Scott Hendison's Old Search Commander Blog","article_publisher":"https:\/\/www.facebook.com\/SearchCommander","article_published_time":"2006-10-02T17:35:00+00:00","article_modified_time":"2014-12-04T20:45:50+00:00","author":"Scott","twitter_card":"summary_large_image","twitter_creator":"@shendison","twitter_site":"@shendison","twitter_misc":{"Written by":"Scott","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/#article","isPartOf":{"@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/"},"author":{"name":"Scott","@id":"https:\/\/www.pdxtc.com\/wpblog\/#\/schema\/person\/3142c7d28dc676725ac62cd6c9de8371"},"headline":"RAID Hard Drive Arrays Made Simple","datePublished":"2006-10-02T17:35:00+00:00","dateModified":"2014-12-04T20:45:50+00:00","mainEntityOfPage":{"@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/"},"wordCount":352,"commentCount":0,"articleSection":["Computers - How to"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/","url":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/","name":"RAID Hard Drive Arrays Made Simple","isPartOf":{"@id":"https:\/\/www.pdxtc.com\/wpblog\/#website"},"datePublished":"2006-10-02T17:35:00+00:00","dateModified":"2014-12-04T20:45:50+00:00","author":{"@id":"https:\/\/www.pdxtc.com\/wpblog\/#\/schema\/person\/3142c7d28dc676725ac62cd6c9de8371"},"description":"Someone sent me this illustrated RAID example that I just had to share... ;) The RAID (Redundant Array of Independent Disks) defintions below are from","breadcrumb":{"@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.pdxtc.com\/wpblog\/computers-how-to\/raid-hard-drive-arrays-made-simple\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.pdxtc.com\/wpblog\/"},{"@type":"ListItem","position":2,"name":"RAID Hard Drive Arrays Made Simple"}]},{"@type":"WebSite","@id":"https:\/\/www.pdxtc.com\/wpblog\/#website","url":"https:\/\/www.pdxtc.com\/wpblog\/","name":"Scott Hendison's Old Search Commander Blog","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.pdxtc.com\/wpblog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.pdxtc.com\/wpblog\/#\/schema\/person\/3142c7d28dc676725ac62cd6c9de8371","name":"Scott","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/ba275e23c0aad37526141e715b54cd3eeac27b071e4395b2b39e801ca68355d6?s=96&r=g","caption":"Scott"},"sameAs":["https:\/\/x.com\/shendison"]}]}},"_links":{"self":[{"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/posts\/286","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/users\/76"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/comments?post=286"}],"version-history":[{"count":0,"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/posts\/286\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/media?parent=286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/categories?post=286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pdxtc.com\/wpblog\/wp-json\/wp\/v2\/tags?post=286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}