72 lines
4.7 KiB
HTML
72 lines
4.7 KiB
HTML
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<meta name="DC.Title" content="Virtual I/O in a logical partition running Linux" />
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<meta name="abstract" content="Virtual I/O resources are devices owned by the hosting i5/OS partition that provides I/O function to the logical partition." />
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<title>Virtual I/O in a logical partition running Linux</title>
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<body id="rzalmvirtualio"><a name="rzalmvirtualio"><!-- --></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">Virtual I/O in a logical partition running Linux</h1>
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<div><p>Virtual I/O resources are devices owned by the hosting i5/OS<sup>®</sup> partition
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that provides I/O function to the logical partition.</p>
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<p>The iSeries™ Linux
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kernel and i5/OS support
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several different kinds of virtual I/O resources. They are virtual console,
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virtual disk unit, virtual CD, virtual tape, and virtual Ethernet.</p>
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<blockquote><p><dfn class="term">Virtual console</dfn> provides console function for the logical
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partition through an i5/OS partition. The virtual console can be established
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to the server or to the primary partition. The use of the virtual console
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allows the installation program to communicate with the user prior to networking
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resources being configured. It can also be used for troubleshooting server
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errors.</p>
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<p><dfn class="term">Virtual disk unit</dfn> can only be provided by a server.
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Virtual disk provides access to NWSSTG virtual disks for Linux. By default,
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the CRTNWSSTG command creates a disk environment with one disk partition formatted
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with the FAT16 file system. The Linux installation program will reformat the
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disk for Linux or you can use Linux commands such as fdisk and mke2fs to format
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the disk for Linux.</p>
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<p><dfn class="term">Virtual CD</dfn> is needed to support the
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installation of Linux and is only provided by a server. By default, a Linux
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partition can see all CD drives on the logical partition. You can change an
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option on the NWSD to restrict Linux from accessing some or all of those drives.
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See <a href="rzalmnwsd.htm">Create a network server description and a network server storage space</a> for more information on
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changing NWSD attributes.</p>
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<p><dfn class="term">Virtual tape</dfn> provides access
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to the i5/OS tape
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drives from a logical partition. By default, a logical partition can see all
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tape drives on the hosted partition. You can change an option on the NWSD
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to restrict Linux from accessing some or all of those drives. See <a href="rzalmnwsd.htm">Create a network server description and a network server storage space</a> for more information on changing NWSD attributes.</p>
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<p><dfn class="term">Virtual
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Ethernet</dfn> provides the same function as using a 1 Gigabyte (GB) Ethernet
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adapter. A logical partition can use virtual Ethernet to establish multiple
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high speed inter-partition connections. i5/OS and Linux partitions
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can communicate with each other using TCP/IP over the virtual Ethernet communication
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ports. Refer to <a href="rzalmvirtuallan.htm">Use virtual Ethernet in a logical partition</a> for
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more information on virtual Ethernet.</p>
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</blockquote>
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<p>For additional information about how your company might use logical partition
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with virtual I/O resources, see <a href="../rzait/rzaitscenarios.htm">Logical and guest partition scenarios</a>.</p>
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</div>
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</body>
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</html>
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