ibm-information-center/dist/eclipse/plugins/i5OS.ic.rzaly_5.4.0.1/rzalymigrating.htm

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<h1 class="topictitle1">Migrating to a new input/output adapter</h1>
<div><div class="section"><h4 class="sectiontitle">RAID 5</h4><p>Before you begin the migration
to the new input/output adapter (IOA), as with any configuration change, it
is important to do a normal system turn off. This will assure that all of
your cache data is written to disk before the power down completes. When a
parity set under an IOA that was released before the V5R2 release is migrated
to an IOA that was released after the V5R2 release, your disk units are not
protected by device parity protection while parity is being regenerated.</p>
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<div class="section"><h4 class="sectiontitle">Cannot migrate to old generation adapters</h4><p>You cannot
migrate a parity set back to the old generation of adapters after you have
made the change to a new adapter. You cannot migrated a parity set back to
the old generation of adapters and keep the data in tact. This action requires
a save and restore of disk unit data to prevent data loss. To migrate RAID
5 protection to RAID 6 or RAID 6 protection to RAID 5 you must
stop and restart the device parity protection.</p>
<div class="note"><span class="notetitle">Note:</span> You cannot migrate
RAID 6 to an adapter that does not support RAID 6.</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalydpp.htm">Device parity protection</a></div>
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