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<meta name="DC.Title" content="i5/OS logical partition function by release" />
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<title>i5/OS logical partition
function by release</title>
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<h1 class="topictitle1"><span class="keyword">i5/OS</span> logical partition
function by release</h1>
<div><p>The capabilities available in <span class="keyword">i5/OS™</span> logical
partitions vary with each operating system release.</p>
<p>When you install multiple releases on a single server, the release on the
primary partition determines the base logical partitioning functionality available
on that server. For example, if you install V4R5 on the primary partition
of a server, you are not able to use shared processors on that server, because
V4R5 does not support shared processors. This is the case even if shared processors
are supported on that server model and you install V5R1 (which supports shared
processors) on multiple secondary partitions. </p>
<p>Also, installing an earlier release on a secondary partition limits the
logical partitioning functionality available to that secondary partition.
For example, if you install V4R5 on a secondary partition, the secondary partition
is not able to use shared processors. This is the case even if you have installed
V5R1 on the primary partition and on other secondary partitions. (The primary
partition and the secondary partitions on which you have installed V5R1 can
still use shared processors, even if you have installed V4R5 on another secondary
partition.)</p>
<p>Use the following table to determine the logical partition function by
release.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th valign="top" id="d0e37"> Software Function</th>
<th valign="top" id="d0e39">V4R4 </th>
<th valign="top" id="d0e41">V4R5 </th>
<th valign="top" id="d0e43">V5R1 and V5R2 </th>
<th valign="top" id="d0e45">V5R3 and later</th>
</tr>
</thead>
<tbody><tr><td valign="top" headers="d0e37 ">Maximum Partitions</td>
<td valign="top" headers="d0e39 ">12 or the number of processors on the system, whichever is less.</td>
<td valign="top" headers="d0e41 ">12 for 6xx, 7xx, Sx0 models; 24 for 820, 830, and 840 models; or the
number of processors on the system, whichever is less.</td>
<td valign="top" headers="d0e43 "><p>12 for 6xx, 7xx, <br />
Sx0 models; 32 <br />
for 270, 810, 820, <br />
825, 830, 840, 870, <br />
and 890 models.<br />
<br />
(The maximum <br />
number of <br />
partitions supported <br />
depends on the <br />
number of <br />
processors in the <br />
server model. 810, <br />
825, 870, and 890 <br />
models only support <br />
V5R2 or later.)</p>
</td>
<td valign="top" headers="d0e45 "><p>12 for 7xx models. <br />
32 for 810,  820, <br />
825, 830, 840, 870, <br />
and 890 models.<br />
<br />
(The maximum <br />
number of partitions <br />
supported depends <br />
on the number of <br />
processors in the <br />
server model.)</p>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Processors</td>
<td valign="top" headers="d0e39 "><ul><li>Static: requires a restart of the partition to change.</li>
<li>Dedicated to a partition.</li>
</ul>
</td>
<td valign="top" headers="d0e41 "><ul><li>Static: requires a restart of the partition to change.</li>
<li>Dedicated to a partition.</li>
</ul>
</td>
<td valign="top" headers="d0e43 "><ul><li>Dynamic: can be changed with a restart of the partition.</li>
<li>Can be shared among multiple partitions.</li>
</ul>
</td>
<td valign="top" headers="d0e45 "><ul><li>Dynamic: can be changed with a restart of the partition.</li>
<li>Can be shared among multiple partitions.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Memory</td>
<td valign="top" headers="d0e39 ">Static: requires a restart of the partition to change.</td>
<td valign="top" headers="d0e41 ">Static: requires a restart of the partition to change.</td>
<td valign="top" headers="d0e43 ">Dynamic: can be changed without a restart of the partition.</td>
<td valign="top" headers="d0e45 ">Dynamic: can be changed without a restart of the partition.</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Interactive</td>
<td valign="top" headers="d0e39 ">Static: requires a restart of the partition to change.</td>
<td valign="top" headers="d0e41 ">Static: requires a restart of the partition to change.</td>
<td valign="top" headers="d0e43 ">Dynamic: can be changed without a restart of the partition.</td>
<td valign="top" headers="d0e45 ">Dynamic: can be changed without a restart of the partition.</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Virtual OptiConnect</td>
<td valign="top" headers="d0e39 "><ul><li>Static: requires a restart of the entire system to change.</li>
<li>Single network.</li>
</ul>
</td>
<td valign="top" headers="d0e41 "><ul><li>Static: requires a restart of the entire system to change.</li>
<li>Single network.</li>
</ul>
</td>
<td valign="top" headers="d0e43 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Single network.</li>
</ul>
</td>
<td valign="top" headers="d0e45 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Single network.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Virtual Ethernet</td>
<td valign="top" headers="d0e39 ">Not supported.</td>
<td valign="top" headers="d0e41 ">Not supported.</td>
<td valign="top" headers="d0e43 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Up to 16 networks.</li>
</ul>
</td>
<td valign="top" headers="d0e45 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Up to 16 networks.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">HSL OptiConnect</td>
<td valign="top" headers="d0e39 ">Not supported.</td>
<td valign="top" headers="d0e41 ">Not supported.</td>
<td valign="top" headers="d0e43 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Can be shared among multiple partitions.</li>
<li>Single network.</li>
</ul>
</td>
<td valign="top" headers="d0e45 "><ul><li>Dynamic: can be changed without a restart of the partition.</li>
<li>Can be shared among multiple partitions.</li>
<li>Single network.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">I/O</td>
<td valign="top" headers="d0e39 "><ul><li>Allocated at bus-level or IOP-level.</li>
<li>IOP can be switched among partitions dynamically.</li>
<li>Bus ownership or bus usage (shared or dedicated) changes require a restart
of the whole system.</li>
</ul>
</td>
<td valign="top" headers="d0e41 "><ul><li>Allocated at bus-level or IOP-level.</li>
<li>IOP can be switched among partitions dynamically.</li>
<li>Bus ownership or bus usage (shared or dedicated) changes require a restart
of the whole system.</li>
</ul>
</td>
<td valign="top" headers="d0e43 "><ul><li>Allocated at bus-level or IOP-level.</li>
<li>IOP can be switched among partitions dynamically.</li>
<li>Bus ownership or bus usage (shared or dedicated) changes occur dynamically.</li>
</ul>
</td>
<td valign="top" headers="d0e45 "><ul><li>Allocated at bus-level or IOP-level.</li>
<li>IOP can be switched among partitions dynamically.</li>
<li>Bus ownership or bus usage (shared or dedicated) changes occur dynamically.</li>
</ul>
</td>
</tr>
<tr><td valign="top" headers="d0e37 ">Guest Partition</td>
<td valign="top" headers="d0e39 ">Not supported.</td>
<td valign="top" headers="d0e41 ">Not supported.</td>
<td valign="top" headers="d0e43 ">Linux<sup>®</sup>.</td>
<td valign="top" headers="d0e45 ">Linux.</td>
</tr>
</tbody>
</table>
</div>
<p>When you have determined the software capabilities, ensure that the particular
hardware model supports all of the required logical partition capabilities.
Additional details are located in Evaluate the hardware limitation of the iSeries™.</p>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaitlicense.htm" title="Learn about the software licensing and pricing strategy for IBM products on an iSeries server with logical partitions.">Software licensing and licensed programs for logical partitions</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzaitevalhardware.htm" title="The 6xx, 7xx, Sxx, 8xx, and 890 n-way base servers support logical partitions (LPAR).">Evaluate the hardware limitations of the iSeries servers</a></div>
</div>
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