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<a name="wp1172509"> </a><h1 class="pTitle">
SCSI Flow Statistics Overview

</h1>
<a name="wp1171892"> </a><p class="pBody">
The statistics that can be collected for SCSI flows include the following:

</p>
<div class="pSmartList1"><ul class="pSmartList1">
<a name="wp1171489"> </a><li class="pSmartList1">SCSI reads
</li>
<div class="pSmartList2"><ul class="pSmartList2">
<a name="wp1171490"> </a><li class="pSmartList2">Number of I/Os</li>
<a name="wp1171491"> </a><li class="pSmartList2">Number of I/O blocks</li>
<a name="wp1171492"> </a><li class="pSmartList2">Maximum I/O blocks</li>
<a name="wp1171493"> </a><li class="pSmartList2">Minimum I/O response time</li>
<a name="wp1171494"> </a><li class="pSmartList2">Maximum I/O response time</li>
</ul></div>
<a name="wp1171495"> </a><li class="pSmartList1">SCSI writes
</li>
<div class="pSmartList2"><ul class="pSmartList2">
<a name="wp1171496"> </a><li class="pSmartList2">Number of I/Os</li>
<a name="wp1171497"> </a><li class="pSmartList2">Number of I/O blocks</li>
<a name="wp1171498"> </a><li class="pSmartList2">Maximum I/O blocks</li>
<a name="wp1171499"> </a><li class="pSmartList2">Minimum I/O response time</li>
<a name="wp1171500"> </a><li class="pSmartList2">Maximum I/O response time</li>
</ul></div>
<a name="wp1171501"> </a><li class="pSmartList1">Other SCSI commands (not read or write)
</li>
<div class="pSmartList2"><ul class="pSmartList2">
<a name="wp1171502"> </a><li class="pSmartList2">Test unit ready</li>
<a name="wp1171503"> </a><li class="pSmartList2">Report LUN </li>
<a name="wp1171504"> </a><li class="pSmartList2">Inquiry</li>
<a name="wp1171505"> </a><li class="pSmartList2">Read capacity</li>
<a name="wp1171506"> </a><li class="pSmartList2">Mode sense</li>
<a name="wp1171507"> </a><li class="pSmartList2">Request sense</li>
</ul></div>
<a name="wp1171508"> </a><li class="pSmartList1">Errors
</li>
<div class="pSmartList2"><ul class="pSmartList2">
<a name="wp1171509"> </a><li class="pSmartList2">Number of timeouts</li>
<a name="wp1171510"> </a><li class="pSmartList2">Number of I/O failures</li>
<a name="wp1171511"> </a><li class="pSmartList2">Number of various SCSI status events</li>
<a name="wp1171512"> </a><li class="pSmartList2">Number of various SCSI sense key errors or events</li>
</ul></div>
</ul></div>
<a name="wp1171513"> </a><p class="pBody">
To take advantage of this feature, only the initiator must be directly attached to an SSM.

</p>
<a name="wp1171514"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> The SCSI flow statistics feature requires the Enterprise Package license installed only on the initiator 
switches.

</p>
<a name="wp1171515"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> For SCSI flow statistics, the initiator must connect to an SSM on a Cisco MDS switch while the target 
can connect to any other switch in the fabric. The SCSI flow initiator and target cannot connect to the 
same switch.

</p>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

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