65 lines
4.0 KiB
HTML
65 lines
4.0 KiB
HTML
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<title>Exclude disk units from a parity set</title>
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<body id="rzalyexcludedpy"><a name="rzalyexcludedpy"><!-- --></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">Exclude disk units from a parity set</h1>
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<div><p>You can select which disk units you want to exclude from the parity set
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as long as they do not contain parity data.</p>
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<p><img src="./delta.gif" alt="Start of change" />For RAID 5 protection, you can exclude a protection
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disk unit with a model number of 070, or 080 if it is compressed, because
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these disk units do not store parity data.<img src="./deltaend.gif" alt="End of change" /></p>
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<p><img src="./delta.gif" alt="Start of change" />For RAID 6 protection, you can exclude a protected disk unit
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with a model number of 090 because it is a disk unit that does not store parity
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data.<img src="./deltaend.gif" alt="End of change" /></p>
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<p> When you exclude a disk unit from the parity set, the data on this disk
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unit remains there but is no longer protected by device parity protection.
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If the disk pool is protected, you are not allowed to exclude a disk unit
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that belongs to that disk pool from a parity set. The system does not allow
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unprotected disk units to reside in a protected disk pool.</p>
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<p>If you want to exclude disk units from an independent disk pool that is
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unavailable, you can do so when your system is fully restarted. For all other
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disk pools, you need to restart your system to dedicated service tools (DST)
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mode before excluding them from a parity set.</p>
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<div class="note"><span class="notetitle">Note:</span> <img src="./delta.gif" alt="Start of change" />Not all disk units in a parity protected set are eligible
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to be excluded. To be eligible, the parity set must contain at least four
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devices with RAID 5 protection and at least five devices for RAID 6 protection,
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and the candidate devices cannot contain parity data.<img src="./deltaend.gif" alt="End of change" /></div>
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<p>To exclude a disk unit from a parity set, follow these steps:</p>
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<ol><li>Expand <span class="uicontrol">Disk Units</span>.</li>
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<li>Select the disk units that you want to exclude.</li>
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<li>Right-click a selected disk unit and select <span class="uicontrol">Exclude from Parity
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Set</span>.</li>
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<li>From the resulting dialog box, click <span class="uicontrol">Exclude</span> to
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exclude the disk units from a parity set.</li>
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</ol>
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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="rzalydpy.htm">Work with device parity protection</a></div>
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</div>
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</div>
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</body>
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