{"id":66,"date":"2016-05-17T09:52:49","date_gmt":"2016-05-17T09:52:49","guid":{"rendered":"http:\/\/mr-west.uk\/gcsecomputerscience\/?page_id=66"},"modified":"2021-11-04T10:19:27","modified_gmt":"2021-11-04T10:19:27","slug":"storage","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/gcsecs\/theory\/storage\/","title":{"rendered":"Storage Device Types"},"content":{"rendered":"\n<div class=\"arconix-tabs-horizontal\"><ul class=\"arconix-tabs\"><li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-PrimaryStorage\"><a class=\"\" href=\"#tab-PrimaryStorage\">Primary Storage<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-SecondaryStorage\"><a class=\"\" href=\"#tab-SecondaryStorage\">Secondary Storage<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-MagneticStorage\"><a class=\"\" href=\"#tab-MagneticStorage\">Magnetic Storage<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-OpticalStorage\"><a class=\"\" href=\"#tab-OpticalStorage\">Optical Storage<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-SolidStateStorage\"><a class=\"\" href=\"#tab-SolidStateStorage\">Solid State Storage<\/a><\/li>\n<li data-arconix-icon=\" \" data-arconix-color=\" \" class=\"arconix-tab tab-Characteristics\"><a class=\"\" href=\"#tab-Characteristics\">Characteristics<\/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-PrimaryStorage\">\n<div class=\"arconix-column-two-thirds\">\n<h3>Primary Storage<\/h3>\n<p>Primary storage is the CPU&#8217;s memory. Due to it&#8217;s volatile nature it is very very fast.<\/p>\n<p>It consists of:<\/p>\n<ul>\n<li>Cache<\/li>\n<li>Ram<\/li>\n<\/ul>\n<p>Whilst primary storage is fast, it has 2 problems:<\/p>\n<ul>\n<li>It is quite small ( RAM 8GB, Cache 512Kb)<\/li>\n<li>It is volatile &#8211; when you turn off the computer, that data goes!<\/li>\n<\/ul>\n<p>Because of this we need secondary storage!<\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<div id=\"attachment_313\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-313\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-313\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cpu-300x168.jpg\" alt=\"\" width=\"300\" height=\"168\" \/><p id=\"caption-attachment-313\" class=\"wp-caption-text\">Cache memory is located in the CPU]<\/p><\/div>\n<div id=\"attachment_314\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-314\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-314\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/ram-300x186.jpg\" alt=\"\" width=\"300\" height=\"186\" srcset=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/ram-300x186.jpg 300w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/ram.jpg 400w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-314\" class=\"wp-caption-text\">Random Access Memory &#8211; A cheap and easy component to upgrade on your pc<\/p><\/div>\n<\/div>\n<\/div>\n<div class=\"arconix-pane pane-SecondaryStorage\">\n<div class=\"arconix-column-two-thirds\">\n<h3>Secondary Storage<\/h3>\n<p>Secondary storage is:<\/p>\n<ul>\n<li>Non &#8211; volatile &#8211; the data remains even when the power is gone.<\/li>\n<li>Slower than primary storage<\/li>\n<li>Much larger in capacity<\/li>\n<\/ul>\n<p>Examples of secondary storage:<\/p>\n<ul>\n<li>HDD<\/li>\n<li>CD Rom Drives<\/li>\n<li>ROM Chips<\/li>\n<li>USB Sticks<\/li>\n<li>SSD Drives<\/li>\n<li>Magnetic tape drives<\/li>\n<\/ul>\n<p><b>Calculating Data Capacity Requirements<\/b><\/p>\n<p>Converting between MB GB etc and working out storage requirements.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-317\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/secondary-storage-devices-257x300.jpg\" alt=\"\" width=\"257\" height=\"300\" srcset=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/secondary-storage-devices-257x300.jpg 257w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/secondary-storage-devices.jpg 527w\" sizes=\"(max-width: 257px) 100vw, 257px\" \/><\/p>\n<\/div>\n<\/div>\n<div class=\"arconix-pane pane-MagneticStorage\">\n<h3>Magnetic Storage Devices<\/h3>\n<p>These are the oldest of the commonly used storage devices, but are still the most widely used.<\/p>\n<ul>\n<li>Magnetic Hard Drives are used to store data and programs on desktops and laptops<\/li>\n<li>Magnetic tape drives are usually used for large server \/ systems backups.<\/li>\n<\/ul>\n<h3>How Magnetic Hard Drives Work Video<\/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\"><\/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>Advantages<\/strong><\/p>\n<ul>\n<li>Cheap Storage per MB (especially tape drives!)<\/li>\n<li>Relatively quick read \/ write speeds.<\/li>\n<\/ul>\n<p><strong>Disadvantages<\/strong><\/p>\n<ul>\n<li>Easily broken if dropped<\/li>\n<li>Slow read \/write compared to new SSD drives.<\/li>\n<li>High energy uses as it uses moving parts (lower battery life on laptops)<\/li>\n<\/ul>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<div id=\"attachment_298\" style=\"width: 262px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-298\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-298 size-full\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/hdd.jpg?_t=1516282909\" alt=\"\" width=\"252\" height=\"200\" \/><p id=\"caption-attachment-298\" class=\"wp-caption-text\">Magnetic HDD With spinning platter in view<\/p><\/div>\n<div id=\"attachment_299\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-299\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-299 size-medium\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/tape-drive-300x225.jpg?_t=1516282888\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/tape-drive-300x225.jpg 300w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/tape-drive-768x576.jpg 768w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/tape-drive.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-299\" class=\"wp-caption-text\">Magnetic tape drives<\/p><\/div>\n<\/div>\n<h3>How they work<\/h3>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=3owqvmMf6No\">Also take a look at this hard drive YouTube video by the slo-mo guys, awesome!<\/a><\/p>\n<p><iframe loading=\"lazy\" src=\"\/\/scratch.mit.edu\/projects\/embed\/198584454\/?autostart=false\" width=\"800\" height=\"600\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<\/div>\n<div class=\"arconix-pane pane-OpticalStorage\">\n<div class=\"arconix-column-two-thirds\">\n<h3>Optical Storage Devices<\/h3>\n<p>Types of optical storage devices:<\/p>\n<ul>\n<li>CD Drives<\/li>\n<li>DVD Drives<\/li>\n<li>BluRay Drives<\/li>\n<\/ul>\n<p>Optical storage devices offer cheap and portable high capacity secondary storage. Far more portable than an internal harddrive, which makes them good for small \/ medium size backups and great for sending through the post.<\/p>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-330\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cd-rom.jpg\" alt=\"\" width=\"225\" height=\"225\" srcset=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cd-rom.jpg 225w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/cd-rom-150x150.jpg 150w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p>\n<\/div>\n<h4><strong>How they work<\/strong><\/h4>\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\"><br \/>\n<\/iframe><br \/>\n<\/div>\n<div class=\"arconix-pane pane-SolidStateStorage\">\n<div class=\"arconix-column-two-thirds\">\n<h3>Solid State Storage Devices<\/h3>\n<p>Solid state storage devices work by storing data in flash chips electronically.<\/p>\n<p><strong>Advantages<\/strong><\/p>\n<ul>\n<li>Very fast read \/ write speeds.<\/li>\n<li>Shock resistant as there are no moving parts to break if knocked<\/li>\n<li>No moving parts so longer battery life ( great for laptops \/ tablets \/ smartphones)<\/li>\n<\/ul>\n<p><strong>Disadvantages<\/strong><\/p>\n<ul>\n<li>More expensive per GB of storage<\/li>\n<li>Limited life span, as each flash cell can only be written to a limited number of times.<\/li>\n<\/ul>\n<\/div>\n<div class=\"arconix-column-one-third\">\n<div id=\"attachment_326\" style=\"width: 292px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-326\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-326 size-full\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/ssd.jpg\" alt=\"\" width=\"282\" height=\"179\" \/><p id=\"caption-attachment-326\" class=\"wp-caption-text\">SSD Drive &#8211; Expensive but fast<\/p><\/div>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-340 size-medium\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/USB_Stick-300x174.jpg\" alt=\"\" width=\"300\" height=\"174\" srcset=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/USB_Stick-300x174.jpg 300w, https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/USB_Stick.jpg 649w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<div id=\"attachment_339\" style=\"width: 205px\" class=\"wp-caption alignnone\"><img aria-describedby=\"caption-attachment-339\" decoding=\"async\" loading=\"lazy\" class=\"wp-image-339 size-full\" src=\"https:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/sd-card.png?_t=1516617516\" alt=\"\" width=\"195\" height=\"259\" \/><p id=\"caption-attachment-339\" class=\"wp-caption-text\">Very portable and small &#8211; but needs a reader to use<\/p><\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<div class=\"arconix-pane pane-Characteristics\">\n<h3>Common Storage Device Comparisons<\/h3>\n<table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<colgroup>\n<col width=\"155\" \/>\n<col width=\"122\" \/>\n<col width=\"122\" \/>\n<col width=\"122\" \/>\n<col width=\"122\" \/>\n<col width=\"122\" \/>\n<col width=\"122\" \/><\/colgroup>\n<tbody>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Device Type&quot;}\"><strong>Device Type<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Capacity&quot;}\"><strong>Capacity<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Speed&quot;}\"><strong>Speed<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Portability&quot;}\"><strong>Portability<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Durability&quot;}\"><strong>Durability<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Reliability&quot;}\"><strong>Reliability<\/strong><\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Cost&quot;}\"><strong>Cost<\/strong><\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Magnetic Hard Drive HDD&quot;}\">Magnetic Hard Drive HDD<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;High Capacity(2TB +)&quot;}\">High Capacity(2TB +)<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Relatively Slow Read \/ Write Speeds&quot;}\">Relatively Slow Read \/ Write Speeds<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very portable and quite heavy&quot;}\">Not very portable and quite heavy<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Long life span, but susceptible to damage \/ data corruption if dropped&quot;}\">Long life span, but susceptible to damage \/ data corruption if dropped<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Reliable&quot;}\">Very Reliable<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Cheapest form of main secondary storage&quot;}\">Cheapest form of main secondary storage<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Solid State Hard Drive&quot;}\">Solid State Hard Drive<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Medium Capacity &lt;1TB&quot;}\">Medium Capacity &lt;1TB<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Exceptionally fast read \/ write speeds&quot;}\">Exceptionally fast read \/ write speeds<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;More portable than HDD but not as portable as other types, as usually inside the pc&quot;}\">More portable than HDD but not as portable as other types, as usually inside the pc<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;No moving parts, so very durable&quot;}\">No moving parts, so very durable<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Quite reliable, up to 5 years.&quot;}\">Quite reliable, up to 5 years.<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Twice the price of HDD Drives&quot;}\">Twice the price of HDD Drives<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SD Card&quot;}\">SD Card<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Low \/ Medium Capacity &lt;256GB&quot;}\">Low \/ Medium Capacity &lt;256GB<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very fast read \/ write, as flash memory&quot;}\">Very fast read \/ write, as flash memory<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Extremely portable&quot;}\">Extremely portable<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Won't be damaged if dropped, but easy to lose and susceptible to water damage &quot;}\">Won&#8217;t be damaged if dropped, but easy to lose and susceptible to water damage<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very reliable, prone to stop working over time&quot;}\">Not very reliable, prone to stop working over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Quite high cost per GB&quot;}\">Quite high cost per GB<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Pen Drive&quot;}\">Pen Drive<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Low \/ Medium Capacity &lt;256GB&quot;}\">Low \/ Medium Capacity &lt;256GB<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very fast read \/ write, as flash memory&quot;}\">Very fast read \/ write, as flash memory<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Extremely portable&quot;}\">Extremely portable<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Won't be damaged if dropped, but easy to lose and susceptible to water damage &quot;}\">Won&#8217;t be damaged if dropped, but easy to lose and susceptible to water damage<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very reliable, prone to stop working over time&quot;}\">Not very reliable, prone to stop working over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Quite high cost per GB&quot;}\">Quite high cost per GB<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;CD (Optical Drive)&quot;}\">CD (Optical Drive)<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Low Capacity 700MB&quot;}\">Low Capacity 700MB<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Slow Read \/ Write speed&quot;}\">Very Slow Read \/ Write speed<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;quite portable, cheap to mail, will work in many devices (PCs, Music Players, Car stereos)&quot;}\">quite portable, cheap to mail, will work in many devices (PCs, Music Players, Car stereos)<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Easy to scratch and data loss easy&quot;}\">Easy to scratch and data loss easy<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very reliable, prone to stop working over time&quot;}\">Not very reliable, prone to stop working over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Low cost per unit(10p)&quot;}\">Very Low cost per unit(10p)<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;DVD&quot;}\">DVD<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Low Capacity 4.7GB&quot;}\">Low Capacity 4.7GB<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Quite Slow Read \/ Write Speed&quot;}\">Quite Slow Read \/ Write Speed<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;quite portable, cheap to mail&quot;}\">quite portable, cheap to mail<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Easy to scratch and data loss easy&quot;}\">Easy to scratch and data loss easy<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very reliable, prone to stop working over time&quot;}\">Not very reliable, prone to stop working over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Low cost per unit (10p)&quot;}\">Very Low cost per unit (10p)<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Blu-ray&quot;}\">Blu-ray<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Medium Capacity 50GB+&quot;}\">Medium Capacity 50GB+<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Medium Read write speed&quot;}\">Medium Read write speed<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;quite portable, cheap to mail&quot;}\">quite portable, cheap to mail<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Easy to scratch and data loss easy&quot;}\">Easy to scratch and data loss easy<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Not very reliable, prone to stop working over time&quot;}\">Not very reliable, prone to stop working over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Low cost per unitl (10p)&quot;}\">Very Low cost per unitl (10p)<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Magnetic Tape Drive&quot;}\">Magnetic Tape Drive<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Massive Capacity&quot;}\">Massive Capacity<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very Slow Read \/ Write speed. Sequential read \/ write only&quot;}\">Very Slow Read \/ Write speed. Sequential read \/ write only<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;quite portable, cheap to mail&quot;}\">quite portable, cheap to mail<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Generally long lasting&quot;}\">Generally long lasting<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Medium reliability over time&quot;}\">Medium reliability over time<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very, very low cost per TB&quot;}\">Very, very low cost per TB<\/td>\n<\/tr>\n<tr>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Cloud Storage&quot;}\">Cloud Storage<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Effectively infinite storage&quot;}\">Effectively infinite storage<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Depends on internet speed, but quite slow&quot;}\">Depends on internet speed, but quite slow<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Can access anywhere there is access to internet&quot;}\">Can access anywhere there is access to internet<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Very durable, due to backups and offsite storage.&quot;}\">Very durable, due to backups and offsite storage.<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;As reliable as internet connection.&quot;}\">As reliable as internet connection.<\/td>\n<td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Cheap per GB, but may require monthly subscription&quot;}\">Cheap per GB, but may require monthly subscription<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"arconix-pane pane-Resources\">\n<p><a href=\"https:\/\/docs.google.com\/document\/d\/1esS-4YznPvEQqOfiEHef58tN7pMm071q-0Q1BVP6Ctk\/edit?usp=sharing\">Secondary Storage Devices Worksheet<\/a><\/p>\n<p><a href=\"https:\/\/play.kahoot.it\/#\/k\/364718a9-456d-4f64-aa28-db4d052acf5e\">Secondary Storage Devices Kahoot<\/a><\/p>\n<p><a href=\"https:\/\/play.kahoot.it\/#\/k\/598aac4a-5c5e-43c6-a724-fc8030f7f09c\">Secondary Storage Devices Kahoot 2<\/a><\/p>\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><a href=\"http:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/Magnetic-Storage-Devices-Revision-Sheet.docx\">Magnetic-Storage-Devices-Revision-Sheet<\/a><\/p>\n<p><a href=\"http:\/\/learnlearn.uk\/gcsecs\/wp-content\/uploads\/sites\/8\/2016\/05\/Solid-State-Devices-Revision-Sheet.docx\">Solid-State-Devices-Revision-Sheet<\/a><\/p>\n<\/div><\/div><\/div>\n\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":61,"menu_order":2,"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 - 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