{"id":119,"date":"2022-10-03T21:03:44","date_gmt":"2022-10-03T21:03:44","guid":{"rendered":"http:\/\/learnlearn.uk\/ibcs\/?page_id=119"},"modified":"2022-10-03T21:03:44","modified_gmt":"2022-10-03T21:03:44","slug":"secondary-storage-devices","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/ibcs\/secondary-storage-devices\/","title":{"rendered":"Secondary Storage Devices"},"content":{"rendered":"<div class=\"responsive-tabs\">\n<h2 class=\"tabtitle\">Starter<\/h2>\n<div class=\"tabcontent\">\n\n<p><iframe loading=\"lazy\" src=\"https:\/\/trinket.io\/embed\/python\/b314034238?outputOnly=true&amp;runOption=run&amp;start=result\" width=\"100%\" height=\"600\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><br \/>\n\n<\/div><h2 class=\"tabtitle\">Optical Storage<\/h2>\n<div class=\"tabcontent\">\n<\/p>\n<div class=\"arconix-column-two-thirds\">\n<h3>Optical Storage Devices<\/h3>\n<p>Optical storage devices work by firing a microscopic laser beam at the surface of a spinning plastic disk, such as a DVD, CD or Blu ray. The surface of the disk is a combination of flats ( representing 1s) or pits (zeros). Depending on whether the laser hits a flat or a pit the laser beam deflects differently, and this difference in deflection is recorded by a later detector.<\/p>\n<p><strong>Advantages of optical storage<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>Cheap per GB of storage<\/li>\n<li>Portable &#8211; cheap and easy to post<\/li>\n<\/ul>\n<\/div>\n<p><strong>Disadvantages of optical storage<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>Easy to break<\/li>\n<li>Not always reliable<\/li>\n<li>Slow read-write speeds<\/li>\n<\/ul>\n<\/div>\n<p><strong>This technology is used in&#8230;<\/strong><\/p>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_164\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-164\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-164 size-thumbnail\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/bluray-150x150.png\" alt=\"bluray\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-164\" class=\"wp-caption-text\">CD Players<\/p><\/div>\n<\/div>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_165\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-165\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-165 size-thumbnail\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/cd-150x150.png\" alt=\"cd\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-165\" class=\"wp-caption-text\">DVD Drives<\/p><\/div>\n<\/div>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_166\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-166\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-166 size-thumbnail\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/dvd-150x150.png\" alt=\"dvd\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-166\" class=\"wp-caption-text\">Blu-ray drives<\/p><\/div>\n<\/div>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=xCAuE7Gg-Bs\">YouTube tutorial video<\/a><\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<div id=\"attachment_62\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/cd-surface.jpg\"><img aria-describedby=\"caption-attachment-62\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-62 size-medium\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/cd-surface-300x178.jpg\" alt=\"cd-surface\" width=\"300\" height=\"178\" \/><\/a><p id=\"caption-attachment-62\" class=\"wp-caption-text\">Close-up of a CD surface<\/p><\/div>\n<\/div>\n\n<\/div><h2 class=\"tabtitle\">Optical Animation<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Optical Storage Devices Animation<\/h3>\n\n<\/div><h2 class=\"tabtitle\">Magnetic Storage<\/h2>\n<div class=\"tabcontent\">\n\n<h3>Magnetic Storage ( Hard Drives, Tape Drives, Floppy Disks)<\/h3>\n<p><iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/ngP6nSt_yAE\" width=\"800\" height=\"600\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/p>\n<p><a href=\"https:\/\/drive.google.com\/file\/d\/1fF76LGxmGcrKFnl_Gkg7Cq6smBUhxPyS\/view?usp=sharing\">Can&#8217;t access YouTube? Click here for the Google Drive Version<\/a><\/p>\n<div class=\"arconix-column-two-thirds\">\n<p><strong>How they work<\/strong><\/p>\n<p>Magnetic drives work by changing the magnetic polarity of the the surface of a glass or metal platter. A read head on a actuator arm detects the polarity and the data is interpreted as either a 1 or a 0, depending on the polarity detected.<\/p>\n<p><strong>Advantages<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>Very cheap per GB storage<\/li>\n<li>Medium\u00a0read\/write speeds<\/li>\n<li>Quite robust<\/li>\n<\/ul>\n<\/div>\n<p><strong>Disadvantages<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>Not very portable<\/li>\n<li>Can be damaged if dropped<\/li>\n<\/ul>\n<\/div>\n<p><strong>This technology is used in&#8230;<\/strong><\/p>\n<div id=\"attachment_171\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-171\" decoding=\"async\" loading=\"lazy\" class=\"size-thumbnail wp-image-171\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/hdd-150x150.png\" alt=\"HDD Hard Drive\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-171\" class=\"wp-caption-text\">HDD Hard Drive<\/p><\/div>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=4iaxOUYalJU\">YouTube tutorial video<\/a><\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<p><a href=\"http:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/hard-driveplatter.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-159\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/hard-driveplatter-300x200.jpg\" alt=\"hard-driveplatter\" width=\"300\" height=\"200\" \/><\/a><\/p>\n<p><a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Hard_Disk_head_top.jpg\">Source: Wikipedia<\/a><\/p>\n<p><a href=\"http:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/525px-Hard_drive-en.svg_.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-160\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/525px-Hard_drive-en.svg_-300x214.png\" alt=\"525px-hard_drive-en-svg\" width=\"300\" height=\"214\" \/><\/a><\/p>\n<p><a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Hard_drive-de.svg#\/media\/File:Hard_drive-en.svg\">Source: Wikipedia<\/a><\/p>\n<p><a href=\"http:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/MagneticMedia.svg_.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-161\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/MagneticMedia.svg_-300x161.png\" alt=\"magneticmedia-svg\" width=\"300\" height=\"161\" \/><\/a><\/p>\n<p><a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:MagneticMedia.svg\">Source: Wikipedia<\/a><\/p>\n<\/div>\n\n<\/div><h2 class=\"tabtitle\">Solid State Drives<\/h2>\n<div class=\"tabcontent\">\n\n<div class=\"arconix-column-two-thirds\">\n<h3>Solid State Drives ( SD Cards, SSD Hard drives, Pen drives)<\/h3>\n<p>Solid state drives work by storing the data inside on microscopic silicon chips \u00a0called floating gate transistors. The floating gate stores electrons, and the memory cell itself can detect if electrons are stored.<\/p>\n<p><strong>Advantages<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>Fast read-write speeds &#8211; \u00a0Because the data is stored directly in the silicon chip the read-write speeds are incredibly quick<\/li>\n<li>As there are no moving parts, SSDs are very robust and can withstand being dropped<\/li>\n<\/ul>\n<\/div>\n<p><strong>Disadvantages<\/strong><\/p>\n<div class=\"arconix-list\" data-arconix-icon=\"fa-chevron-circle-right\" data-arconix-color=\"black\">\n<ul>\n<li>They are more expensive per GB than other forms of storage<\/li>\n<\/ul>\n<\/div>\n<p><strong>This technology is used in&#8230;<\/strong><\/p>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_172\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-172\" decoding=\"async\" loading=\"lazy\" class=\"size-thumbnail wp-image-172\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/pendrive-150x150.png\" alt=\"Pen Drives\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-172\" class=\"wp-caption-text\">Pen Drives<\/p><\/div>\n<\/div>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_173\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-173\" decoding=\"async\" loading=\"lazy\" class=\"size-thumbnail wp-image-173\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/sd-card-150x150.jpg\" alt=\"SD Cards\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-173\" class=\"wp-caption-text\">SD Cards<\/p><\/div>\n<\/div>\n<div class=\"arconix-column-one-fourth\">\n<div id=\"attachment_174\" style=\"width: 160px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-174\" decoding=\"async\" loading=\"lazy\" class=\"size-thumbnail wp-image-174\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/ssd-drive-150x150.jpg\" alt=\"SSD Hard Drives\" width=\"150\" height=\"150\" \/><p id=\"caption-attachment-174\" class=\"wp-caption-text\">SSD Hard Drives in smartphones and tablets<\/p><\/div>\n<\/div>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=viac3j6MeII\">YouTube tutorial video<\/a><\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<p><a href=\"http:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/Floating_gate_transistor-en.svg_.png\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-162\" src=\"https:\/\/learnlearn.uk\/binary\/wp-content\/uploads\/sites\/11\/2017\/01\/Floating_gate_transistor-en.svg_.png\" alt=\"floating_gate_transistor-en-svg\" width=\"283\" height=\"106\" \/><\/a><\/p>\n<p><a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Floating_gate_transistor-en.svg\">Source: Wikipedia<\/a><\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/div><\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Optical Storage Devices Animation Magnetic Storage ( Hard Drives, Tape Drives, Floppy Disks) Can&#8217;t access YouTube? 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