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Network Direct Attached Storage
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<h2 id="history">History</h2> <p>In 2001, Han-gyoo Kim of Korea and Zhe Khi Pak of Russia applied for a US patent on a "network-attached disk".<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> By 2002 the first NetDisk (up to 80 GB) was marketed as a low cost alternative to full computer based network storage options. The Ximeta company was founded in 2003.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> In 2004 Kim applied for a patent to allow multiple clients write access to the shared block storage device.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> By 2006, sizes up to 500 GB were supported.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> In 2008 an NDAS device called "ShareDisk Gigabit" created by Co-World Cs in Germany briefly claimed the title of world's fastest network storage device.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p><p>In 2011 IOCELL Networks announced ownership of the NDAS system and NetDisk patents.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> The following year, IOCELL revived <a href="/facts/Linux/9FvCKSTq">Linux</a> client support for NDAS—which Ximeta had "temporarily suspended" in September 2009<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a>—by releasing the drivers under the terms of the <a href="/facts/GNU_General_Public_License/S75KhLSX">GNU General Public License</a> (GPL) as the open-source "ndas4linux" project.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p> <h2 id="benefits">Benefits</h2> <ul><li>Hardware is typically easy to set up and use, particularly when a unit is purchased with a disk installed.</li> <li>The disk drive can be used via multiple interfaces (typically <a href="/facts/ESATA/dW8yAMm8">eSATA</a>, <a href="/facts/USB/XcIKWLyg">USB</a> or Ethernet) though not concurrently: USB and eSATA allow access by only one host.</li> <li>The disks do not require special formatting so they can be treated as external disks on a wide variety of computers.</li> <li>Performance (speed vs. cost) is claimed to be better than similarly priced storage devices.</li> <li>Devices are isolated from external network discovery since the protocol is not visible through a router.</li></ul> <h2 id="drawbacks">Drawbacks</h2> <ul><li>The LPX Protocol is not routable, thus limiting access to one <a href="/facts/Local_area_network/edUDxJ6J">local area network</a>.</li> <li>Some firewall programs block the LPX protocol by default. It uses <a href="/facts/EtherType/Lt0ADRfK">EtherType</a> value 0x88AD.</li> <li>Drivers required to operate NDAS devices over a network are not shipped with operating systems. The devices are usually accompanied with client driver software for <a href="/facts/Microsoft_Windows/bwhAhuSL">Microsoft Windows</a> operating systems.</li> <li>Drivers for <a href="/facts/Linux/9FvCKSTq">Linux</a>-based operating systems (<a href="/facts/Linux_distribution/0vVl4N4f">Linux distributions</a> such as <a href="/facts/Fedora_(operating_system)/LJ2ocge5">Fedora</a>, <a href="/facts/Ubuntu_(operating_system)/0WDd7hkb">Ubuntu</a> or <a href="/facts/Debian/cBd93qfJ">Debian</a>) were originally available only from the manufacturer.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></li></ul> <h2 id="see-also">See also</h2> <p>A similar protocol is <a href="/facts/ATA_over_Ethernet/GKWzu5S0">ATA over Ethernet</a>. </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Bruce Normann (November 28, 2011). "IOCELL NetDISK 351UNE Network Storage Device". Benchmark Reviews. Product review. Retrieved June 1, 2013. <a href="http://benchmarkreviews.com/index.php?option=com_content&task=view&id=849" target="_blank">http://benchmarkreviews.com/index.php?option=com_content&task=view&id=849</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Disk system adapted to be directly attached to network. U.S. patent 7,792,923 by Han-gyoo Kim and Zhe Khi Pak, Filed October 9, 2001, granted September 7, 2010. <a href="http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=7792923" target="_blank">http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=7792923</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Ximeta: Creator of NDAS". Archived from the original on April 20, 2019. Retrieved June 1, 2013. <a href="https://web.archive.org/web/20190420084630/http://www.ximeta.com/" target="_blank">https://web.archive.org/web/20190420084630/http://www.ximeta.com/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>System using a single host to receive and redirect all file access commands for shared data storage device from other hosts on a network . U.S. patent 7,457,880 by Han-gyoo Kim, Filed September 27, 2004, granted November 25, 2008. <a href="http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=7457880" target="_blank">http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=7457880</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Ximeta NetDisk Portable". Review. CNet. November 2, 2006. Retrieved June 1, 2013. <a href="https://www.cnet.com/network-storage/ximeta-netdisk-portable-500gb/4505-3382_7-32017036.html" target="_blank">https://www.cnet.com/network-storage/ximeta-netdisk-portable-500gb/4505-3382_7-32017036.html</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"The World's Fastest Network Storage" (PDF). Ximeta, Germany. May 2008. Retrieved June 1, 2013. <a href="http://www.ximeta.de/pdf/ShareDisk_Gigabit-Ger.pdf" target="_blank">http://www.ximeta.de/pdf/ShareDisk_Gigabit-Ger.pdf</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"IOCELL Networks Purchases Innovative NDAS Technology". News release. IOCELL. August 4, 2011. Retrieved June 1, 2013. <a href="http://www.iocellnetworks.com/neo/index.php/press/item/iocell-networks-purchases-innovative-ndas-technology" target="_blank">http://www.iocellnetworks.com/neo/index.php/press/item/iocell-networks-purchases-innovative-ndas-technology</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"SuspendSepDec". code.ximeta.com. Archived from the original on 2010-06-16. Retrieved 2021-09-04. <a href="https://web.archive.org/web/20100616162427/http://code.ximeta.com/trac-ndas/wiki/SuspendSepDec" target="_blank">https://web.archive.org/web/20100616162427/http://code.ximeta.com/trac-ndas/wiki/SuspendSepDec</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>"iocellnetworks/ndas4linux". GitHub. 27 April 2021. Retrieved 2021-09-04. <a href="https://github.com/iocellnetworks/ndas4linux" target="_blank">https://github.com/iocellnetworks/ndas4linux</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"Welcome to code.ximeta.com". Archived from the original on 2008-12-01. Retrieved 2021-09-04. <a href="https://web.archive.org/web/20081201023907/http://code.ximeta.com:80/trac-ndas" target="_blank">https://web.archive.org/web/20081201023907/http://code.ximeta.com:80/trac-ndas</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> </ol>