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<title>External Chassis Fan Probes Information</title>
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<h3><b><a name="top">External Chassis Fan Probes Information</a></b></h3>
<p>Use this window to review the redundancy status of external chassis fans and to see a
list of fans.</p>
<p>Systems can be designed with redundant fans to prevent system shutdown due to fan
failure. When fans are present in a system, being able to see that one or two fans have
failed enables administrators to replace fans and restore redundancy before the last fan
failure causes the entire system to fail. </p>
<h4>User Privileges</h4>
<table cellSpacing="3" cellPadding="4" border="2">
<tbody>
<tr>
<td vAlign="top" align="left" width="261" rowspan="2"><b>Selection</b></td>
<td vAlign="top" align="center" width="365" colSpan="2" height="20"><b>User Privileges</b></td>
</tr>
<tr>
<td vAlign="top" align="center" width="365" colSpan="2" height="20"><i>
U=User; P=Power User; A=Administrator; NA=Not Applicable</i></td>
</tr>
<tr>
<td vAlign="top" align="left" width="261" height="21"> </td>
<td vAlign="top" align="center" width="171" height="21"><b>View</b></td>
<td vAlign="top" align="center" width="181" height="21"><b>Manage</b></td>
</tr>
<tr>
<td vAlign="top" align="left" width="261" height="21">External Chassis Fan
Probes Information </td>
<td vAlign="top" align="center" width="171" height="21">U, P, A</td>
<td vAlign="top" align="center" width="181" height="21">NA</td>
</tr>
</tbody>
</table><br>
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<td vAlign="top" align="left" width="21">
<img border="0" src="note.gif" width="17" height="17"></td>
<td><span class="notes">NOTE: </span>For more details on user privilege
levels, see "<a href="../../oma/en/UserLevels.html">Privilege Levels
in the Server Administrator GUI</a>."</td>
</tr>
</table>
<h4> Fan Redundancy</h4>
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<td class="data-area-canvas" vAlign="top" align="left"><b>Redundancy Status</b></td>
<td class="data-area-canvas" vAlign="top" align="left">Status can be <em>Full</em>, <em>Degraded</em>,
or <em>Lost</em>. If the number of fans in a system that is required for full redundancy
is three: <p>Redundancy status is <em>Full</em> when three fans are working.</p>
<p>Redundancy status is <em>Degraded</em> when two fans are working.</p>
<p>Redundancy status is <em>Lost</em> when one fan is working.</p>
<p>Full redundancy is defined by system specification. Degraded redundancy means that one
or more of the extra fans is not working in the normal range. Lost redundancy means that
there are no backup fans available to take over for the minimum number required, but at
least one fan is working. </p>
<p><em>Critical/Failure</em> status would describe a system that had no working fan, and
redundancy is designed to make this sort of system failure unlikely.</td>
</tr>
<tr>
<td class="data-area-canvas" vAlign="top" align="left"><strong>Number of devices
required for full redundancy</strong></td>
<td class="data-area-canvas" vAlign="top" align="left">Your system has a number of fans
defined for full redundancy. If the number of fans required for Full redundancy is three,
redundancy is degraded when two fans are working, and lost when only one fan is working.</td>
</tr>
</tbody>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<h4>Fan Probe List</h4>
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<td vAlign="top" align="left" width="30%"><strong>Status</strong></td>
<td vAlign="top" align="left" width="70%">Displays whether the event type for the probe is
<i>Normal/OK</i>, <i>Warning/Noncritical</i>, or <i>Critical/Failure</i>.</td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Probe Name</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays the alphanumeric
text that uniquely identifies a fan probe; for example, <i>CPU Fan</i>. </font></td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Reading</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays a snapshot of the
fan RPM actually measured by the probe at a given time.</font></td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Minimum Warning Threshold</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays the lowest
acceptable fan RPM that is recommended for system operation. Values that fall below this
RPM level result in warning events.</font></td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Maximum Warning Threshold</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays the highest
acceptable fan RPM that is recommended for system operation. Values that exceed this fan
RPM result in warning events.</font></td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Minimum Failure Threshold</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays the lowest
acceptable fan RPM that is required for system operation. Values that fall below this fan
RPM result in critical/failure events.</font></td>
</tr>
<tr>
<td vAlign="top" align="left" width="30%"><strong>Maximum Failure Threshold</strong></td>
<td vAlign="top" align="left" width="70%"><font color="#000000">Displays the highest
acceptable fan RPM that is required for system operation. Values that exceed this fan RPM
result in critical/failure events.</font></td>
</tr>
</tbody>
</table>
<p>[<a href="#top">Back to Top</a>]</p>
<p> </p>
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