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<title>Changing the Phy Link Speed</title>
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<a class="WebWorks_Breadcrumb_Link" href="Config_Controller.5.1.html#1262395">Configuring Your Controller</a> &gt; Changing the Phy Link Speed</div>
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<div class="Heading1"><a name="1262395">Changing the Phy Link Speed</a></div>
<div class="Body"><a name="1277898">You can change the link speed between the controller and an expander or </a>between the controller and a drive that is directly connected to the controller. Typically, the phy link speed is set to Auto. If desired for compatibility, troubleshooting or performance analysis, you can specify a specific link speed (1.5 Gbps, 3.0 Gbps, or 6.0 Gbps). </div>
<div class="ToDo"><a name="1277899">To change the phy link speed in 3DM2</a></div>
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<div class="NumberedFirst_inner"><a name="1277900">On the </a><a href="Controller_Phy_Summary.html#1461905">Controller Phy Summary page</a>, identify the phy device for which you wish to change the link speed. Direct-attached drives are identified by their VPort ID.</div>
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<div class="Numbered_inner"><a name="1258756">In the </a><span class="UI-Element">Link Control</span> drop-down menu, select the desired speed: 6 Gbps, 3&nbsp;Gbps, 1.5 Gbps, or Auto.</div>
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<div class="Numbered_inner"><a name="1268828">A reboot is required to reset the link speed to the new setting.</a></div>
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<div class="anchor-indented"><a name="1349526">&nbsp;</a></div>
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<div class="CellBody"><span class="NoteHeading"><a name="1349557">Caution:</a></span> Restricting the link speed to a higher setting will not allow slower devices to be recognized by the firmware.</div>
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<div class="Indent"><a name="1277907">For details about the information displayed on this screen, see </a><a href="Controller_Phy_Summary.html#1461905">Controller Phy Summary page</a>.</div>
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<div class="RelatedTopic"><a href="Config_Controller.5.4.html#1135243" name="1373898">Viewing Controller Policies</a></div>
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<div class="RelatedTopic"><a href="Config_Controller.5.5.html#1115045" name="1373902">Setting the Auto-Rebuild Policy</a></div>
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<div class="RelatedTopic"><a href="Config_Controller.5.6.html#1091097" name="1373906">Using Auto-Carving for Multi LUN Support</a></div>
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<div class="RelatedTopic"><a href="Config_Controller.5.7.html#1115233" name="1373910">Setting the Size of Volumes Created with Auto-Carving</a></div>
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<div class="RelatedTopic"><a href="Config_Controller.5.8.html#1320680" name="1373914">Enabling and Setting Up Staggered Spin-up</a></div>
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<div class="RelatedTopic"><a href="Config_Controller.5.9.html#1258742" name="1373918">Viewing Information About a Phy</a></div>
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