188 lines
8.7 KiB
HTML
188 lines
8.7 KiB
HTML
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<a class="WebWorks_Breadcrumb_Link" href="Trbleshoot.11.1.html#1364416">Troubleshooting</a> > Drive Performance Monitoring</div>
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<div class="Heading1"><a name="1364416">Drive Performance Monitoring</a></div>
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<div class="BodyAfterHead"><a name="1364422">When one drive in a RAID unit is responding much slower than others, it </a>reduces the performance of the entire unit.</div>
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<div class="Body"><a name="1364429">Drive Performance Monitoring (DPM) is now available to measure drive </a>performance, and to help identify when a specific drive is causing problems so that you can have the drive manufacturer repair or replace it.</div>
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<div class="Body"><a name="1364504">DPM is an advanced trouble-shooting tool. Commands are available through </a>the 3ware CLI to enable and disable DPM, and to see a range of different statistics. These statistics can be useful to LSI technical support to help you troubleshoot problems with your RAID controller and units.</div>
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<div class="Body"><a name="1365681">The following drive statistical data can be stored and reported:</a></div>
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<div class="Bullet_inner"><span class="Bold0Body"><a name="1365682">Queue depth</a></span>, which indicates the number of read/writes that are currently outstanding.</div>
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<div class="Bullet_inner"><span class="Bold0Body"><a name="1365683">IOP</a></span>, which indicates the number of read/writes that have completed</div>
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<div class="Bullet_inner"><span class="Bold0Body"><a name="1365684">Transfer rate</a></span>, which indicates the number of sectors that have been read/written</div>
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<div class="Bullet_inner"><span class="Bold0Body"><a name="1365685">Response time</a></span>, which indicates the execution time of all commands</div>
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<div class="Bullet_inner"><span class="Bold0Body"><a name="1365686">Command read/writes</a></span>, which indicates the drive and drive sectors' accumulated read and write commands.</div>
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<div class="Body"><a name="1521339">For more information about Drive Performance Monitoring and how to work </a>with the data, see the CLI Syntax Reference in the <span class="Emphasis">3ware SATA+SAS RAID </span><span class="Emphasis">Controller Card CLI Guide, Version 10.2</span>. </div>
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<img src="images/toc.gif" alt="Table of Contents" border="0" />
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</a>
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</td>
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<a href="Trbleshoot.11.5.html">
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<td style="text-align: left; font-size: 16px ; font-weight: bold">
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<a href="http://www.lsi.com/channel/products" target="_blank">LSI Corporation</a>
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<p style="font-size: .8em">Copyright LSI 2004-2010<br />
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To contact Support, go to <a href="http://www.lsi.com/channel/ContactUs">http://www.lsi.com/channel/ContactUs</a></p>
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