122 lines
7.0 KiB
HTML
122 lines
7.0 KiB
HTML
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<meta name="DC.Title" content="Decide what IPL type to use when running Linux" />
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<meta name="abstract" content="The IPL type parameter on the NWSD determines the source from which a logical operating system is loaded." />
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<meta name="description" content="The IPL type parameter on the NWSD determines the source from which a logical operating system is loaded." />
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<title>Decide what IPL type to use when running Linux</title>
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<body id="rzalmipl"><a name="rzalmipl"><!-- --></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">Decide what IPL type to use when running Linux</h1>
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<div><p>The IPL type parameter on the NWSD determines the source from which
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a logical operating system is loaded.</p>
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<p>The first thing to understand is that on an iSeries™ server the initial program load
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(IPL) comes from one of four locations managed by the LPAR configuration.
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These four locations are called A, B, C, and D. The initial program (which
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in the case of Linux is the Linux kernel) can be loaded into these locations
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two ways:</p>
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<ul><li>From Linux itself</li>
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<li>The C location can be loaded by i5/OS<sup>®</sup> using a network server description
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(NWSD.)</li>
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</ul>
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<p>The NWSD itself has a parameter called IPLSRC that specifies from where
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the logical partition is to be loaded. This parameter can have the following
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values:</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th valign="top" width="10.606060606060606%" id="d0e36">IPLSRC value</th>
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<th valign="top" width="89.39393939393939%" id="d0e38">Description</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">A</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">Load the logical partition from location A. Location
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A must have been previously loaded with a kernel from Linux. IBM<sup>®</sup> recommends
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using the A location to store a stable, known kernel.</td>
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</tr>
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<tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">B</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">Load the logical partition from location B. Location
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B must have been previously loaded with a kernel from Linux. IBM recommends
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using B for testing new kernels</td>
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</tr>
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<tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">D</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">IBM support reserves this type of IPL for future use.</td>
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</tr>
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<tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">*Panel</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">The partition is started from the source indicated on
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the operator's panel.</td>
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</tr>
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<tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">*NWSSTG (network server storage space)</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">This IPL type is used to start a partition from a virtual
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disk. i5/OS will
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find the kernel in the virtual disk and load it in location C. Then the partition
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will be set to IPL from C. i5/OS searches the first virtual disk connected to
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the NWSD for a partition marked startable, and of type 0x41 (PReP start.)
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The contents of this location are loaded in C. If a partition of this type
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does not exist, the partition will fail.</td>
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</tr>
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<tr><td valign="top" width="10.606060606060606%" headers="d0e36 ">*STMF (stream file)</td>
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<td valign="top" width="89.39393939393939%" headers="d0e38 ">This IPL type is used to start a partition from a kernel
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loaded in the i5/OS Integrated
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File System. Note that the Integrated File System includes files on the Optical
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(CD) drive on i5/OS. i5/OS will
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load the specified file into the C location and the partition will be set
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to IPL from C. This is typically how initial Linux installations are performed.</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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<div class="section"><h4 class="sectiontitle">Booting from the LPAR configuration display</h4><p>The
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LPAR configuration display can be used to set a logical partition to IPL from
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four locations. These locations are A, B, C, and D. Currently D is reserved
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for future use. The IPL type determines which copy of programs your server
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uses during the initial program load (IPL). These parameter can have the following
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values:</p>
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</div>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th valign="top" width="11.6751269035533%" id="d0e105">IPLSRC values</th>
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<th valign="top" width="88.3248730964467%" id="d0e107">Description</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" width="11.6751269035533%" headers="d0e105 ">A</td>
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<td valign="top" width="88.3248730964467%" headers="d0e107 ">Load the logical partition from location A. Location
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A must have been previously loaded with a kernel from Linux. IBM recommends
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using the A location to store a stable, known kernel.</td>
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</tr>
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<tr><td valign="top" width="11.6751269035533%" headers="d0e105 ">B</td>
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<td valign="top" width="88.3248730964467%" headers="d0e107 ">Load the logical partition from location B. Location
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B must have been previously loaded with a kernel from Linux. IBM recommends
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using B for testing new kernels.</td>
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</tr>
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<tr><td valign="top" width="11.6751269035533%" headers="d0e105 ">C</td>
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<td valign="top" width="88.3248730964467%" headers="d0e107 ">This IPL type is typical used when a partition is loading
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from a network server description (NWSD) or a stream file (STMF). Refer to
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*NWSSTG for more information on how the C IPL type is used.</td>
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</tr>
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<tr><td valign="top" width="11.6751269035533%" headers="d0e105 ">D</td>
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<td valign="top" width="88.3248730964467%" headers="d0e107 ">IBM support reserves this type of IPL for future use.</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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</div>
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</body>
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</html>
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