106 lines
6.3 KiB
HTML
106 lines
6.3 KiB
HTML
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<meta name="DC.Title" content="SPD cabling" />
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<meta name="abstract" content="During a model upgrade or an expansion unit conversion of a partitioned system (moving a partition from one server to another or changing an expansion unit from a 5065 to a 5074), an SPD bus may be removed." />
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<title>SPD cabling</title>
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</head>
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<body id="rzamdexpanupgradecable"><a name="rzamdexpanupgradecable"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">SPD cabling</h1>
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<div><p>During a model upgrade or an expansion unit conversion of a partitioned
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system (moving a partition from one server to another or changing an expansion
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unit from a 5065 to a 5074), an SPD bus may be removed.</p>
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<div class="section"><p>This has serious consequences to the LPAR configuration. SPD buses
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are cabled in pairs and are numbered by the system on each IPL. This numbering
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is done by determining to which port they are connected from the bus adapter.
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When there are two buses connected to a bus adapter, the numbering of the
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buses is determined as follows. A cable runs from the top port of the bus
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adapter to the top port of the SPD bus; this is the first bus number. A cable
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then runs from the bottom port of the SPD bus to the top port of the second
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SPD bus; this is the next bus number. Finally, a cable runs back to the system
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to complete the loop.</p>
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<p>Due to the way these buses are cabled, they always
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have the same bus number on each IPL. However, if the first bus is removed,
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the second bus takes the bus number of the first bus. If both of these buses
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are in the same partition, required LPAR configuration actions are minimal.
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If the hardware in these buses is spread between different partitions or if
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there is a required resource, for instance load source or console, LPAR configuration
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actions must be taken before the partitions are powered on. The following
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step should be performed any time an SPD bus is removed from a partitioned
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system:</p>
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</div>
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<div class="p"><span>Determine if the bus to be removed will result in another bus being
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renumbered. </span><ol type="a"><li><span>Use the following table to determine if the bus that will be
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removed is cabled to the top or bottom port of the bus expansion adapter.</span></li>
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<li><span>If the bus being removed is cabled to the <strong>bottom</strong> port
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of the bus expansion adapter, then no buses are being recabled due to the
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conversion of this tower.</span></li>
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<li><span>If the bus being removed is cabled to the <strong>top</strong> port of
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the bus expansion adapter, then determine if there is also a bus attached
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to the bottom port (it will be one number higher than the bus being removed).
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If there is a bus attached to the bottom port of the bus expansion adapter,
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then there will be a bus recabled during this expansion unit conversion.</span></li>
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</ol>
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</div>
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<div class="section">
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th rowspan="2" valign="top" id="d0e48">iSeries™ server model</th>
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<th colspan="2" valign="top" id="d0e52">Bus numbers</th>
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</tr>
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<tr><th valign="top" id="d0e55">Top port </th>
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<th valign="top" id="d0e57">Bottom port </th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e48 ">720/620</td>
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<td valign="top" headers="d0e52 d0e55 ">Odd</td>
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<td valign="top" headers="d0e52 d0e57 ">Even</td>
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</tr>
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<tr><td valign="top" headers="d0e48 ">730/740/SX0</td>
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<td valign="top" headers="d0e52 d0e55 ">Even</td>
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<td valign="top" headers="d0e52 d0e57 ">Odd</td>
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</tr>
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<tr><td valign="top" headers="d0e48 ">820/830/840*</td>
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<td valign="top" headers="d0e52 d0e55 ">Odd</td>
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<td valign="top" headers="d0e52 d0e57 ">Even</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>* Only applies to buses 5 through 22.</p>
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<div class="note"><span class="notetitle">Example:</span> If bus 10 is to be removed on an iSeries Model 730 server, then bus 10
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is cabled to the top port ("even" buses on an iSeries Model 730 server are attached
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to the top port) so the system must be checked to determine whether a bus
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11 is present.</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzamdplanexpanupgradelpar.htm" title="An expansion unit conversion causes the following changes to the server resources.">Plan to convert the expansion unit</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzamdplanexpanupgradelpar.htm" title="An expansion unit conversion causes the following changes to the server resources.">Plan to convert the expansion unit</a></div>
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</div>
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</div>
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