{"id":109947,"date":"2021-02-24T11:00:27","date_gmt":"2021-02-24T05:30:27","guid":{"rendered":"https:\/\/www.vskills.in\/certification\/tutorial\/?page_id=109947"},"modified":"2024-04-12T14:30:48","modified_gmt":"2024-04-12T09:00:48","slug":"storage-devices-2","status":"publish","type":"page","link":"https:\/\/www.vskills.in\/certification\/tutorial\/storage-devices-2\/","title":{"rendered":"Storage Devices"},"content":{"rendered":"\n<p>It is consist of primary and secondary memory.<\/p>\n\n\n\n<p><strong>Primary<\/strong> <strong>Storage<\/strong> <strong>Devices<\/strong> \u2013 It is internal storage and consists of cache, ROM &amp; RAM.<\/p>\n\n\n\n<p>RAM (Random Access Memory) &#8211; It is read\/write volatile memory storing temporary data in MB.<\/p>\n\n\n\n<p>ROM (Read Only Memory) &#8211; It stores data permanently which can only be read so it is non-volatile. It stores programs for booting the computer, like BIOS (Basic Input &amp; Output System).<\/p>\n\n\n\n<p>Cache &#8211; It is used for speeding up the data supply to CPU and stores frequently used data in KB.<\/p>\n\n\n\n<p><strong>Secondary<\/strong> <strong>Storage<\/strong> <strong>Devices<\/strong> \u2013 It is usually external storage and consists of tape, disk &amp; flash.<\/p>\n\n\n\n<p>Magnetic Tape \u2013 It is similar to an audiocassette having plastic strip for storage in a cartridge. It is slow in data access but, input and output speeds is high. Its capacity is up to 5120 GB.<\/p>\n\n\n\n<p>Disk Drives \u2013 It is circular in shape having track and sectors. The disk surface is divided in concentric circles called tracks which are further subdivided into sectors. Greater the number of tracks so, more is the storage capacity of the disk.<\/p>\n\n\n\n<p><em>Hard<\/em> <em>Disk<\/em> <em>Drive<\/em> \u2013 It is used for mass storage with direct access. It is non-volatile in sizes like 3.5\u201d, 5.5\u201d and 8\u201d. It has disk platters on a spindle, with read\/write head having 250-1024 GB capacity.<\/p>\n\n\n\n<p><em>Optical<\/em> <em>Disk<\/em> &#8211; Laser beam burns disk surface to write and low power reflected beam to read. It has speed rating or data transfer speed where 1X refers to 150 Kbps. CD-ROM and DVD are examples with 700 MB and 4.3 GB capacity. Blue ray is upcoming technology with 50 GB data.<\/p>\n\n\n\n<p>Flash Memory \u2013 It uses semiconductor memory and is used in USB drives, memory cards, etc.<\/p>\n\n\n\n<p>Data can be read or written to it and device can be detached to transfer or move data.<\/p>\n\n\n\n<p><strong>Central<\/strong> <strong>Processing<\/strong> <strong>Unit<\/strong> <strong>(C.P.U)<\/strong> &#8211; It executes given commands and consist of<\/p>\n\n\n\n<p>Control Unit &#8211; It supervises and controls information flow by a clock signal as per which the processing is done. Clock signal is given in MHz\/GHz (Mega Hertz\/ Giga Hertz).<\/p>\n\n\n\n<p>Arithmetic Logic Unit \u2013 It performs arithmetic and logical operations on data from memory.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Apply for IT Support Certification<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.vskills.in\/certification\/certified-it-support-professional\">https:\/\/www.vskills.in\/certification\/certified-it-support-professional<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/certified-it-support-professional\/\" target=\"_blank\" rel=\"noreferrer noopener\">Back to Tutorials<\/a><\/strong><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>It is consist of primary and secondary memory. Primary Storage Devices \u2013 It is internal storage and consists of cache, ROM &amp; RAM. RAM (Random Access Memory) &#8211; It is read\/write volatile memory storing temporary data in MB. ROM (Read Only Memory) &#8211; It stores data permanently which can only be read so it is&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[127],"tags":[],"class_list":["post-109947","page","type-page","status-publish","hentry","category-it-support-professional"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Storage Devices - Tutorial<\/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:\/\/www.vskills.in\/certification\/tutorial\/storage-devices-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Storage Devices - Tutorial\" \/>\n<meta property=\"og:description\" content=\"It is consist of primary and secondary memory. 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