{"id":149,"date":"2022-11-27T14:32:47","date_gmt":"2022-11-27T14:32:47","guid":{"rendered":"http:\/\/learnlearn.uk\/ibcs\/?page_id=149"},"modified":"2022-11-27T15:07:10","modified_gmt":"2022-11-27T15:07:10","slug":"optical-storage-devices","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/","title":{"rendered":"Optical Storage Devices (CD, DVD, BluRay)"},"content":{"rendered":"<div class=\"responsive-tabs\">\n<h2 class=\"tabtitle\">Introduction<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Optical Storage Devices<img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-330 alignright\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cd-rom.jpg\" alt=\"\" width=\"225\" height=\"225\" \/><\/h3>\n<p><a href=\"http:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/Optical-Storage-Devices-Revision-Sheet.docx\">Optical-Storage-Devices-Revision-Sheet<\/a><\/p>\n<p>Optical Storages used to be incredibly popular up until the last couple of years where cloud storage and the rise of video and game streaming services have massively reduced their popularity.<\/p>\n<p>Types of optical storage devices:<\/p>\n<ul>\n<li>CD Drives\u00a0 (700MB)<\/li>\n<li>DVD Drives\u00a0 (4.7GB)<\/li>\n<li>BluRay Drives (50GB)<\/li>\n<\/ul>\n<p>Optical storage devices offer cheap and portable high capacity secondary storage. Far more portable than an internal hard-drive, which makes them good for small \/ medium size backups and great for sending through the post.<\/p>\n\n<\/div><h2 class=\"tabtitle\">How they work<\/h2>\n<div class=\"tabcontent\">\n\n<h3><strong>How they work<\/strong><\/h3>\n<p>Optical storage devices work by firing a laser at the surface of a spinning disk. The disc is covered in a pattern of pits in the CD surface. As the laser hits the pits it is reflected and the pattern of pits it detected by a laser detector.<\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/scratch.mit.edu\/projects\/embed\/61133374\/?autostart=false\" width=\"800\" height=\"600\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><br \/>\n<\/iframe><\/p>\n\n<\/div><h2 class=\"tabtitle\">Pros &amp; Cons<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Advantages &amp; Disadvantages of Optical Storage Devices<\/h3>\n<p><strong>Advantages<\/strong><\/p>\n<ul>\n<li>Low cost per GB of storage due to being manufactured mostly from cheap plastic<\/li>\n<li>Cheap and easy to distribute compared to magnetic storage<\/li>\n<li>Media can be played on home entertainment systems and in-car systems.<\/li>\n<\/ul>\n<p><strong>Disadvantages<\/strong><\/p>\n<ul>\n<li>The discs can easily be scratched and therefore aren&#8217;t very robust<\/li>\n<li>Most portable devices don&#8217;t support optical storage any more.<\/li>\n<li>They have a fairly low read-write speed.<\/li>\n<li>Burning data to a CD\/DVD requires specialist software and it doesn&#8217;t always work successfully.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n\n<\/div><h2 class=\"tabtitle\">Resources<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Resources<\/h3>\n<p>&nbsp;<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Optical Storage Devices Optical-Storage-Devices-Revision-Sheet Optical Storages used to be incredibly popular up until the last couple of years where cloud storage and the rise of video and game streaming services have massively reduced their popularity. Types of optical storage devices: CD Drives\u00a0 (700MB) DVD Drives\u00a0 (4.7GB) BluRay Drives (50GB) Optical storage devices offer cheap and&hellip;&nbsp;<a href=\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\" class=\"\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Optical Storage Devices (CD, DVD, BluRay)<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Optical Storage Devices (CD, DVD, BluRay) - IB Computer Science<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optical Storage Devices (CD, DVD, BluRay) - IB Computer Science\" \/>\n<meta property=\"og:description\" content=\"Optical Storage Devices Optical-Storage-Devices-Revision-Sheet Optical Storages used to be incredibly popular up until the last couple of years where cloud storage and the rise of video and game streaming services have massively reduced their popularity. Types of optical storage devices: CD Drives\u00a0 (700MB) DVD Drives\u00a0 (4.7GB) BluRay Drives (50GB) Optical storage devices offer cheap and&hellip;&nbsp;Read More &raquo;Optical Storage Devices (CD, DVD, BluRay)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\" \/>\n<meta property=\"og:site_name\" content=\"IB Computer Science\" \/>\n<meta property=\"article:modified_time\" content=\"2022-11-27T15:07:10+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cd-rom.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\",\"url\":\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\",\"name\":\"Optical Storage Devices (CD, DVD, BluRay) - IB Computer Science\",\"isPartOf\":{\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#website\"},\"datePublished\":\"2022-11-27T14:32:47+00:00\",\"dateModified\":\"2022-11-27T15:07:10+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"IB Computer Science\",\"item\":\"https:\/\/learnlearn.uk\/ibcs\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Optical Storage Devices (CD, DVD, BluRay)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#website\",\"url\":\"https:\/\/learnlearn.uk\/ibcs\/\",\"name\":\"IB Computer Science\",\"description\":\"- learnlearn..uk\",\"publisher\":{\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/learnlearn.uk\/ibcs\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#organization\",\"name\":\"IB Computer Science\",\"url\":\"https:\/\/learnlearn.uk\/ibcs\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/learnlearn.uk\/ibcs\/wp-content\/uploads\/sites\/25\/2022\/09\/LearnLearnLogowhite-300x41.png\",\"contentUrl\":\"https:\/\/learnlearn.uk\/ibcs\/wp-content\/uploads\/sites\/25\/2022\/09\/LearnLearnLogowhite-300x41.png\",\"width\":300,\"height\":41,\"caption\":\"IB Computer Science\"},\"image\":{\"@id\":\"https:\/\/learnlearn.uk\/ibcs\/#\/schema\/logo\/image\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Optical Storage Devices (CD, DVD, BluRay) - IB Computer Science","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:\/\/learnlearn.uk\/ibcs\/optical-storage-devices\/","og_locale":"en_GB","og_type":"article","og_title":"Optical Storage Devices (CD, DVD, BluRay) - IB Computer Science","og_description":"Optical Storage Devices Optical-Storage-Devices-Revision-Sheet Optical Storages used to be incredibly popular up until the last couple of years where cloud storage and the rise of video and game streaming services have massively reduced their popularity. 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