50 lines
13 KiB
HTML
50 lines
13 KiB
HTML
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<!--replace-end-7--><!--replace-end-4--><!--replace-end-1--></head><body><div class="ui fluid container universe"><!--replace-start-2--><!--replace-start-3--><!--replace-start-6--><div class="ui text container" id="zettel-container" style="position: relative"><div class="zettel-view"><article class="ui raised attached segment zettel-content"><div class="pandoc"><h1 id="title-h1">What are disks?</h1><p>A disk is a mass storage <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: Devices"><a href="Devices.html">block_device</a></span></span> which we can write to and read from.</p><h2 id="scsi">SCSI</h2><ul><li>Small Computer System Interface, responsible for handling disk access on most Linux systems.</li><li>It is a protocol that allows communicaton between printers, scanners and other peripherals in addition to harddisks.</li></ul><h2 id="disk-schematic">Disk schematic</h2><p>The following diagram represents the basic anatomy of a disk device.</p><p><img src="/static/harddisk.png" /></p><ul><li>A disk is divided up into <span class="zettel-link-container errors"><span class="zettel-link" title="Wiki-link does not refer to any existing zettel"><a>Partitions</a></span></span> which are subsections of the overall disk. The kernel presents each partition as a <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: Devices"><a href="Devices.html">block device</a></span></span> as it would with an entire disk.</li><li>The disk dedicates a small part of its contents to a <strong>partition table</strong>: this defines the different partitions that comprise the total disk space.</li><li>The <strong>filesystem</strong> is a database of files and directories: this comprises the bulk of the partition and is what you interact with in <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: User space"><a href="User_Space.html">user space</a></span></span> when reading and writing data.</li></ul></div></article><nav class="ui attached segment deemphasized backlinksPane" id="neuron-backlinks-pane"><h3 class="ui header">Backlinks</h3><ul class="backlinks"><li><span class="zettel-link-container cf"><span class="zettel-link"><a href="Motherboard.html">Motherboard</a></span></span><ul class="context-list" style="zoom: 85%;"><li class="item"><div class="pandoc"><p>The motherboard is the foundation of a computer. It allocates power and allows communication to and between the <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: CPU architecture"><a href="CPU_architecture.html">CPU</a></span></span>, <span class="zettel-link-container errors"><span class="zettel-link" title="Wiki-link does not refer to any existing zettel"><a>Memory</a></span></span>, <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: What are disks?"><a href="What_are_disks.html">harddisk</a></span></span> and all other hardware components.</p></div></li></ul></li><li><span class="zettel-link-container cf"><span class="zettel-link"><a href="Chipset_and_controllers.html">Chipset and controllers</a></span></span><ul class="context-list" style="zoom: 85%;"><li class="item"><div class="pandoc"><p>The chipset manages the data flow between the different components that comprise the <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: Motherboard"><a href="Motherboard.html">motherboard</a></span></span>: processor, <span class="zettel-link-container errors"><span class="zettel-link" title="Wiki-link does not refer to any existing zettel"><a>Memory</a></span></span>, <span class="zettel-link-container cf"><span class="zettel-link" title="Zettel: What are disks?"><a href="What_are_disks.html">harddisk</a></span></span> and peripherals.</p></div></li></ul></li></ul></nav><nav class="ui attached segment deemphasized bottomPane" id="neuron-tags-pane"><div><span class="ui basic label zettel-tag" title="Tag">computer-architecture</span><span class="ui basic label zettel-tag" title="Tag">disks</span></div></nav><nav class="ui bottom a
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