100 lines
6.1 KiB
HTML
100 lines
6.1 KiB
HTML
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<meta name="DC.Title" content="Prepare for virtual tape storage" />
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<meta name="abstract" content="This topic provides information about meeting the requirements for virtual tape storage and preparing to use it." />
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<title>Prepare for virtual tape storage</title>
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<body id="rzam4virtualtapeprep"><a name="rzam4virtualtapeprep"><!-- --></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">Prepare for virtual tape storage</h1>
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<div><p>This topic provides information about meeting the requirements
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for virtual tape storage and preparing to use it.</p>
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<div class="section"><p>To prepare to use virtual tape storage, you need to consider these
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items:</p>
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<ul><li>Whether you have the authority to create virtual images</li>
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<li>How much disk space you have</li>
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<li>The number of virtual images volumes you need</li>
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<li>The maximum block size supported by the physical tape device that the
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virtual tape volume will be saved to</li>
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<li>Make sure that the user profiles used to create the virtual tape volumes
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has its maximum storage allowed attribute set to *NOMAX.</li>
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</ul>
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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> <img src="./delta.gif" alt="Start of change" /><a href="rzam4virtualtape.htm" title="When you use virtual tape devices, you create virtual tape volumes that exist on your server disk units.">Virtual tape</a><img src="./deltaend.gif" alt="End of change" /></div>
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</div>
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</div><div class="nested1" xml:lang="en-us" id="howmuchdiskspacehave"><a name="howmuchdiskspacehave"><!-- --></a><h2 class="topictitle2">How much disk space you have</h2>
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<div><div class="section"><p>Because virtual images are stored on your disk units, they can
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quickly use disk space. It is essential that you determine you have enough
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disk space. The smallest allowable size for a tape image file volume is 48
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MB. The largest allowable size is 1,000,000 MB.</p>
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<p>To determine how much
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disk space you have, do the following:</p>
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</div>
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<ol><li class="stepexpand"><span>In iSeries™ Navigator,
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expand <span class="menucascade"><span class="uicontrol">My Connections</span> > <span class="uicontrol">your iSeries
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server</span> > <span class="uicontrol">Configuration and Service</span> > <span class="uicontrol">Hardware</span> > <span class="uicontrol">Disk Units</span> > <span class="uicontrol">Disk Pools</span></span>.</span></li>
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<li class="stepexpand"><span>Right-click the <span class="uicontrol">Disk Pool</span> you want to view,
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and select <span class="uicontrol">Properties</span>.</span></li>
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<li class="stepexpand"><span>Select the <span class="uicontrol">Capacity</span> tab.</span> <p>The <span class="uicontrol">Capacity</span> page
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displays the used space, free space, total capacity, threshold, and percentage
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of disk space used for the disk pool.</p>
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<div class="p"><div class="note"><span class="notetitle">Note:</span> Disk usage is limited to
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95% of capacity. The tape operation will stop with an end of media error when
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95% of disk capacity is reached.</div>
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</div>
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<p>You can also use the <a href="../cl/wrkdsksts.htm">Work with Disk Status (WRKDSKSTS) command</a> to
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determine your free space.</p>
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</li>
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</ol>
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<div class="section"><p>If you need to clean up disk space, see <a href="../rzahc/rzahcswscleanup2.htm">Clean
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up disk storage space</a>.</p>
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</div>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="createstoragespace"><a name="createstoragespace"><!-- --></a><h2 class="topictitle2">Clean up disk storage space</h2>
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<div><div class="section">Steps to clean up storage space:</div>
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<ol><li><span>Remove any unused virtual tape volumes by using RMVIMGCLGE KEEP(*NO).</span></li>
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<li><span>Delete any unused objects.</span></li>
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<li><span>Save objects by specifying STG(*FREE).</span></li>
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<li><span>Save the old log versions of QHST that are not currently used and
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then delete them.</span></li>
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<li><span>Print or delete spooled files on the system.</span></li>
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</ol>
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</div>
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</div>
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<div class="nested1" xml:lang="en-us" id="thenumbervolvirtualimage"><a name="thenumbervolvirtualimage"><!-- --></a><h2 class="topictitle2">The number of volumes of virtual images you need</h2>
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<div><div class="section">Steps to determine how many volumes you need:</div>
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<ol><li><span>Determine how much data you plan to store.</span></li>
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<li><span>Determine the size of each virtual image. Determine image size
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based on what you plan to do with the tape image file. <span class="apiname">Keep files
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small if you want to electronically transfer them to another system</span>.</span></li>
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</ol>
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</div>
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</div>
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</body>
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