{"id":418,"date":"2016-01-17T07:33:30","date_gmt":"2016-01-17T07:33:30","guid":{"rendered":"http:\/\/mr-west.uk\/igcse\/?page_id=418"},"modified":"2016-01-17T07:33:30","modified_gmt":"2016-01-17T07:33:30","slug":"3-1-magnetic-storage-devices","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/igcseict\/3-storage-devices-and-media\/3-1-magnetic-storage-devices\/","title":{"rendered":"3.1 Magnetic Storage Devices Lesson Plan"},"content":{"rendered":"\n<div class=\"arconix-tabs-horizontal\"><ul class=\"arconix-tabs\"><li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-Starter\"><a class=\"\" href=\"#tab-Starter\">Starter<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-MagneticStorageDevices\"><a class=\"\" href=\"#tab-MagneticStorageDevices\">Magnetic Storage Devices<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-HardDisks\"><a class=\"\" href=\"#tab-HardDisks\">Hard Disks<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-TapeDrives\"><a class=\"\" href=\"#tab-TapeDrives\">Tape Drives<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-FloppyDisks\"><a class=\"\" href=\"#tab-FloppyDisks\">Floppy Disks<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-Plenary\"><a class=\"\" href=\"#tab-Plenary\">Plenary<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-Resources\"><a class=\"\" href=\"#tab-Resources\">Resources<\/a><\/li><\/ul>\n<div class=\"arconix-panes\"><div class=\"arconix-pane pane-Starter\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"arconix-pane pane-MagneticStorageDevices\">\n<div class=\"arconix-accordions arconix-accordions-vertical arconix-accordions-1\"><div class=\"arconix-accordion-title accordion-Whatarethey\"><i class=\"fa\"><\/i><p>What are they?<\/p><\/div><div class=\"arconix-accordion-content\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright\" src=\"https:\/\/learnlearn.uk\/igcseict\/wp-content\/uploads\/sites\/3\/2016\/01\/magnet-312777_960_720.png\" alt=\"\" width=\"300\" height=\"286\" \/><\/p>\n<p>[note title=&#8221;Key Definition: Magnetic Storage Devices&#8221;]<\/p>\n<p>Magnetic storage devices are any devices that store binary data on magnetically polarised plates or tapes.\u00a0The pattern of polarisation indicates whether the data stored represents binary 1 or 0.<\/p>\n<p>[\/note]<\/p>\n<p>The most common types of magnetic storage devices\u00a0are:<\/p>\n<ul>\n<li>hard disk drives (HDD)<\/li>\n<li>tape drives<\/li>\n<li>floppy disk drives<\/li>\n<\/ul>\n<\/div><div class=\"arconix-accordion-title accordion-Howdotheywork\"><i class=\"fa\"><\/i><p>How do they work?<\/p><\/div><div class=\"arconix-accordion-content\">\n<p>Magnetic storage devices store data\u00a0by polarising the surface of a magnetic disk,tape or platter using a tiny electromagnet. The stored is then read by the read head passing over the magnetised surface and the direction of polarisation is then detected.<\/p>\n\n<!-- iframe plugin v.6.0 wordpress.org\/plugins\/iframe\/ -->\n<iframe src=\"\/\/scratch.mit.edu\/projects\/embed\/61190058\/?autostart=false\" width=\"485\" height=\"402\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n\n<!-- iframe plugin v.6.0 wordpress.org\/plugins\/iframe\/ -->\n<iframe src=\"\/\/www.youtube.com\/embed\/4iaxOUYalJU\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<\/div><\/div>\n<\/div>\n<div class=\"arconix-pane pane-HardDisks\">\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignright\" src=\"https:\/\/learnlearn.uk\/igcseict\/wp-content\/uploads\/sites\/3\/2016\/01\/Seagate_ST33232A_hard_disk_inner_view.jpg\" alt=\"\" width=\"341\" height=\"170\" \/><img decoding=\"async\" loading=\"lazy\" class=\"alignright\" src=\"https:\/\/learnlearn.uk\/igcseict\/wp-content\/uploads\/sites\/3\/2016\/01\/HDD_Heads.jpg\" alt=\"\" width=\"269\" height=\"179\" \/><\/p>\n<p>Magnetic hard disks are currently the most common form of storage in desktop and laptop computers(although SSD drives are rapidly catching up!)<\/p>\n<p>Data is store in hard drives on metal or glass plates, or platters.<\/p>\n<h3>Advantages<\/h3>\n<p>Can you think of any advantages of Hard Disk Drives?<\/p>\n<div class=\"arconix-toggle-wrap\"><div class=\"arconix-toggle-title toggle-closed\"><i class='fa fa-plus-square'><\/i>Advantages<\/div><div class=\"arconix-toggle-content\">\n<ul>\n<li>Relatively cheap per GB<\/li>\n<li>Reliable long term storage<\/li>\n<li>Fast access as the actuator arm can move to any point on the platter very quickly<\/li>\n<\/ul>\n<\/div><\/div>\n<h3>Disadvantages<\/h3>\n<p>Can you think of any disadvantages of Hard Disk Drives?<\/p>\n<div class=\"arconix-toggle-wrap\"><div class=\"arconix-toggle-title toggle-closed\"><i class='fa fa-plus-square'><\/i>Disadvantage<\/div><div class=\"arconix-toggle-content\">\n<ul>\n<li>Slower Read \/ Write speed than some forms of storage because of moving parts.<\/li>\n<li>Can fail without warning because of moving parts.<\/li>\n<li>susceptible to corruption of data if subjected to a strong magnetic field, if dirt gets in the housing, or if the device is dropped.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n<div class=\"arconix-pane pane-TapeDrives\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"arconix-pane pane-FloppyDisks\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"arconix-pane pane-Plenary\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"arconix-pane pane-Resources\">\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div><\/div><\/div>\n\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":160,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template_fullwidth.php","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"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 - 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