<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xml:lang="en" lang="en" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <title>Enabling and Disabling Queuing for a Unit</title> <link rel="StyleSheet" href="css/Config_Units.css" type="text/css" media="all" /> <link rel="StyleSheet" href="css/webworks.css" type="text/css" media="all" /> <script type="text/javascript" language="JavaScript1.2" src="scripts/expand.js"></script> <script type="text/javascript" language="JavaScript1.2" src="scripts/seealso.js"></script> <script type="text/javascript" language="JavaScript1.2"> <!-- var WebWorksRootPath = ""; // --> </script> <script type="text/javascript" language="JavaScript1.2"> <!-- var WebWorksSeeAlso = "xxx"; // --> </script> </head> <body style=""> <table align="right"> <tr> <td style="text-align: left;"> <a href="http://www.lsi.com/channel/products" target="_blank"> <img src="LSI-logo.jpg" border="0" /> </a> </td> </tr> </table> <div style="text-align: left;"> <p style="color: Navy; font-weight:bold">3DM2™ Online Help</p> <table cellspacing="0"> <tr> <td> <a href="toc.html"> <img src="images/toc.gif" alt="Table of Contents" border="0" /> </a> </td> <td> <a href="Config_Units.6.12.html"> <img src="images/prev.gif" alt="Previous" border="0" /> </a> </td> <td> <a href="Config_Units.6.14.html"> <img src="images/next.gif" alt="Next" border="0" /> </a> </td> <td> <a href="ix.html"> <img src="images/index.gif" alt="Index" border="0" /> </a> </td> </tr> </table> </div> <br clear="all" /> <br /> <div class="WebWorks_Breadcrumbs" style="text-align: left;"> <a class="WebWorks_Breadcrumb_Link" href="Config_Units.6.1.html#1173071">Configuring Units</a> > <a class="WebWorks_Breadcrumb_Link" href="Config_Units.6.8.html#1173071">Setting Unit Policies</a> > Enabling and Disabling Queuing for a Unit</div> <hr align="left" /> <div> <div class="Heading2"><a name="1173071">Enabling and Disabling Queuing for a Unit</a></div> <div class="BodyAfterHead"><a name="1236926">Some drives support command queuing, a feature that can result in increased </a>performance for applications that require a lot of random access of data (usually server-type applications). This is accomplished by causing command reordering to be done on the drive.</div> <div class="Body"><a name="1173074">In order to make use of command queuing, the feature must be enabled at both </a>the drive and the controller. You can enable support for command queuing on a per-unit basis, as described below.</div> <div class="Body"><a name="1173075">You can see whether command queuing is supported and enabled for a </a>particular drive in the Drive Details window. For details, see <a href="Drive_Details.html#1039080">Drive Details window</a>. </div> <div class="anchor"> <span class="Red"> </span><a name="1199891"> </a></div> <table id="1199895" class="NoteTable" style="margin-bottom: pt; margin-right: pt; margin-top: pt; padding-bottom: pt; padding-left: pt; padding-right: pt; padding-top: pt; text-align: left;" cellspacing="0"> <caption></caption> <tr style="vertical-align: top;"> <td id="tc1199897" style="background-color: Transparent; border-bottom-color: White; border-bottom-style: solid; border-bottom-width: thin; border-left-color: White; border-left-style: solid; border-left-width: thin; border-right-color: White; border-right-style: solid; border-right-width: thin; border-top-color: White; border-top-style: solid; border-top-width: thin; padding-bottom: pt; padding-left: pt; padding-right: pt; padding-top: pt; vertical-align: top;"> <div class="NoteAnchor"> <img src="Note.gif" alt="*" id="bullet1199897" border="0" width="27" height="34" /><a name="1199897"> </a></div> </td> <td id="tc1199899" style="background-color: Transparent; border-bottom-color: White; border-bottom-style: solid; border-bottom-width: thin; border-left-color: White; border-left-style: solid; border-left-width: thin; border-right-color: White; border-right-style: solid; border-right-width: thin; border-top-color: White; border-top-style: solid; border-top-width: thin; padding-bottom: pt; padding-left: pt; padding-right: pt; padding-top: pt; vertical-align: top;"> <div class="CellBody"><span class="NoteHeading"><a name="1199899">Note:</a></span> Not all drives support command queuing. If a drive does not support command queuing, the policy setting for the controller is ignored. Queuing information for SAS is not available.</div> </td> </tr> </table> <div class="ToDo"><a name="1173083">To enable or disable queuing for a unit through 3DM2</a></div> <div class="NumberedFirst_outer" style="margin-left: NaN;"> <table border="0" cellspacing="0" cellpadding="0" id="SummaryNotRequired_np1173084"> <tr style="vertical-align: baseline;"> <td> <div class="NumberedFirst_inner" style="width: 1.5em; white-space: nowrap;"> <span class="UI-Element">1 </span> </div> </td> <td width="100%"> <div class="NumberedFirst_inner"><a name="1173084">Choose </a><span class="UI-Element">Management >> Controller Settings</span> from the menu bar in 3DM2.</div> </td> </tr> </table> </div> <div class="Numbered_outer" style="margin-left: NaN;"> <table border="0" cellspacing="0" cellpadding="0" id="SummaryNotRequired_np1173088"> <tr style="vertical-align: baseline;"> <td> <div class="Numbered_inner" style="width: 1.5em; white-space: nowrap;"> <span class="UI-Element">2 </span> </div> </td> <td width="100%"> <div class="Numbered_inner"><a name="1173088">In the </a><span class="UI-Element">Unit Policies </span>section of the <a href="Controller_Settings.html#1088416">Controller Settings page</a>, enable queuing by checking the box under “Queuing” for the designated unit; disable it by unchecking the box.</div> </td> </tr> </table> </div> <div class="Indent"><a name="1173089">The page refreshes, and a message at the top confirms the change that you </a>have made.</div> <hr /> <dl> <dt>Related Topics</dt> <dd> <div class="RelatedTopic"><a href="Config_Units.6.9.html#1113091" name="2407435">Enabling and Disabling the Unit Write Cache</a></div> </dd> <dd> <div class="RelatedTopic"><a href="Config_Units.6.10.html#2185087" name="2407439">Working with Read Cache Settings</a></div> </dd> <dd> <div class="RelatedTopic"><a href="Config_Units.6.11.html#2185080" name="2407443">Enabling or Disabling Auto-Verify for a Unit</a></div> </dd> <dd> <div class="RelatedTopic"><a href="Config_Units.6.12.html#1589821" name="2407447">Setting Overwrite ECC (Continue on Source Error When Rebuilding)</a></div> </dd> <dd> <div class="RelatedTopic"><a href="Config_Units.6.14.html#1113125" name="2407451">Setting the StorSave Profile for a Unit</a></div> </dd> <dd> <div class="RelatedTopic"><a href="Config_Units.6.15.html#2055333" name="2407455">Rapid RAID Recovery</a></div> </dd> </dl> </div> <hr align="left" /> <div style="text-align: left;"> <table cellspacing="0"> <tr> <td> <a href="toc.html"> <img src="images/toc.gif" alt="Table of Contents" border="0" /> </a> </td> <td> <a href="Config_Units.6.12.html"> <img src="images/prev.gif" alt="Previous" border="0" /> </a> </td> <td> <a href="Config_Units.6.14.html"> <img src="images/next.gif" alt="Next" border="0" /> </a> </td> <td> <a href="ix.html"> <img src="images/index.gif" alt="Index" border="0" /> </a> </td> </tr> </table> </div> <table align="right"> <tr> <td style="text-align: left;"> <a href="http://www.lsi.com/channel/products" target="_blank"> <img src="LSI-logo.jpg" border="0" /> </a> </td> </tr> <tr> <td style="text-align: left; font-size: 16px ; font-weight: bold"> <a href="http://www.lsi.com/channel/products" target="_blank">LSI Corporation</a> </td> </tr> </table> <p style="font-size: .8em">Copyright LSI 2004-2010<br /> To contact Support, go to <a href="http://www.lsi.com/channel/ContactUs">http://www.lsi.com/channel/ContactUs</a></p> </body> </html>