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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Disk array</span></span>

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<p>A <b>disk array</b> is a <a href="Disk_storage" title="Disk storage">disk storage</a> system which contains multiple disk drives.<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> It is differentiated from a <a href="Disk_enclosure" title="Disk enclosure">disk enclosure</a>, in that an array has <a href="Cache_(computing)" title="Cache (computing)">cache</a> memory and advanced functionality, like <a href="Redundant_array_of_independent_disks" class="mw-redirect" title="Redundant array of independent disks">RAID</a>, <a href="Data_deduplication" title="Data deduplication">deduplication</a>, <a href="Encryption" title="Encryption">encryption</a> and <a href="Storage_virtualization" title="Storage virtualization">virtualization</a>.

</p><p>Components of a disk array include:<sup id="cite_ref-:1_2-0" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<ul><li><a href="Disk_array_controller" title="Disk array controller">Disk array controllers</a></li>

<li><a href="Cache_(computing)" title="Cache (computing)">Cache</a> in form of both volatile <a href="Random-access_memory" title="Random-access memory">random-access memory</a> and <a href="Non-volatile_memory" title="Non-volatile memory">non-volatile</a> <a href="Flash_memory" title="Flash memory">flash memory</a>.</li>

<li><a href="Disk_enclosure" title="Disk enclosure">Disk enclosures</a> for both <a href="Magnetic_storage" title="Magnetic storage">magnetic</a> rotational <a href="Hard_disk_drive" title="Hard disk drive">hard disk drives</a> and electronic <a href="Solid-state_drive" title="Solid-state drive">solid-state drives</a>.</li>

<li><a href="Power_supply" title="Power supply">Power supplies</a></li></ul>

<p>Typically a disk array provides increased availability, resiliency, and maintainability by using additional redundant components (controllers, power supplies, fans, etc.), often up to the point where all <a href="Single_point_of_failure" title="Single point of failure">single points of failure</a> (SPOFs) are eliminated from the design.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Additionally, disk array components are often <a href="Hot_swapping" title="Hot swapping">hot-swappable</a>.

</p><p>Traditionally disk arrays were divided into categories:<sup id="cite_ref-:1_2-1" class="reference"><a href="#cite_note-:1-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<ul><li><a href="Network_attached_storage" class="mw-redirect" title="Network attached storage">Network attached storage</a> (NAS) arrays</li>

<li><a href="Storage_area_network" title="Storage area network">Storage area network</a> (SAN) arrays:

<ul><li>Modular SAN arrays</li>

<li>Monolithic SAN arrays</li>

<li>Utility Storage Arrays</li></ul></li>

<li><a href="Storage_virtualization" title="Storage virtualization">Storage virtualization</a></li></ul>

<p>Primary vendors of storage systems include <a href="Coraid%2C_Inc." title="Coraid, Inc.">Coraid, Inc.</a>, <a href="DataDirect_Networks" title="DataDirect Networks">DataDirect Networks</a>, <a href="Dell_EMC" class="mw-redirect" title="Dell EMC">Dell EMC</a>, <a href="Fujitsu" title="Fujitsu">Fujitsu</a>, <a href="Hewlett_Packard_Enterprise" title="Hewlett Packard Enterprise">Hewlett Packard Enterprise</a>, <a href="Hitachi_Data_Systems" title="Hitachi Data Systems">Hitachi Data Systems</a>, <a href="Huawei" title="Huawei">Huawei</a>, <a href="IBM" title="IBM">IBM</a>, <a href="Infortrend" title="Infortrend">Infortrend</a>, <a href="NetApp" title="NetApp">NetApp</a>, <a href="Oracle_Corporation" title="Oracle Corporation">Oracle Corporation</a>, <a href="Panasas" class="mw-redirect" title="Panasas">Panasas</a>, <a href="Pure_Storage" title="Pure Storage">Pure Storage</a> and other companies that often act as <a href="OEM" class="mw-redirect" title="OEM">OEM</a> for the above vendors and do not themselves market the storage components they manufacture.<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFBeal2004" class="citation web cs1">Beal, Vangie (19 October 2004). <a rel="nofollow" class="external text" href="https://www.webopedia.com/TERM/D/disk_array.html">"What is Disk Array Definition? Webopedia Definition"</a>. <i>www.webopedia.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-07</span></span>.</cite></span>

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<li id="cite_note-:1-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-:1_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:1_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.dnsstuff.com/storage-array">"What Is a Storage Array? Data Server and Disk Architecture"</a>. <i>DNSstuff</i>. 2019-10-10<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-07</span></span>.</cite></span>

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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://searchstorage.techtarget.com/definition/array">"What is disk array? - Definition from WhatIs.com"</a>. <i>SearchStorage</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-07</span></span>.</cite></span>

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</style><div id="RAID207" style="font-size:114%;margin:0 4em"><a href="RAID" title="RAID">RAID</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="Data_redundancy" title="Data redundancy">Redundant</a> of independent <a href="Hard_disk_drive" title="Hard disk drive">disks</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Data_scrubbing#RAID" title="Data scrubbing">Data scrubbing</a></li>

<li><a href="Data_striping" title="Data striping">Data striping</a></li>

<li><a href="Disk_array_controller" title="Disk array controller">Disk array controller</a></li>

<li><a href="Disk_mirroring" title="Disk mirroring">Disk mirroring</a></li>

<li><a href="Parity_drive" title="Parity drive">Parity drive</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="RAID_levels" title="RAID levels">RAID levels</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Standard_RAID_levels" title="Standard RAID levels">Standard</a></li>

<li><a href="Nested_RAID_levels" title="Nested RAID levels">Nested</a></li>

<li><a href="Non-standard_RAID_levels" title="Non-standard RAID levels">Non-standard</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Principles</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Availability" title="Availability">Availability</a>

<ul><li><a href="Fault_tolerance" title="Fault tolerance">Fault tolerance</a></li>

<li><a href="Data_redundancy" title="Data redundancy">Data redundancy</a></li>

<li><a href="Degraded_mode" title="Degraded mode">Degraded mode</a></li>

<li><a href="Failover" title="Failover">Failover</a></li>

<li><a href="Parity_bit" title="Parity bit">Parity bit</a></li>

<li><a href="Replication_(computing)" title="Replication (computing)">Replication</a></li></ul></li>

<li><a href="Scalability" title="Scalability">Scalability</a></li>

<li><a href="Throughput" class="mw-redirect" title="Throughput">Throughput</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Interface_(computing)" title="Interface (computing)">Interfaces</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Bioctl" title="Bioctl">bioctl</a></li>

<li><a href="Mdadm" title="Mdadm">mdadm</a></li>

<li><a href="Oracle_ZFS" title="Oracle ZFS">Oracle ZFS</a></li></ul>

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="Non-RAID_drive_architectures" title="Non-RAID drive architectures">Non-RAID drive architectures</a></div></td></tr></tbody></table></div></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2025-07-11" href="https://en.wikipedia.org/wiki/?title=Disk_array&oldid=1300029348">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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