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<div class="Heading3-CS"><a name="1021707">0008 Unclean shutdown detected</a></div>
<div class="Heading4"><a name="1143651">Event Type</a></div>
<div class="BodyAfterHead"><a name="1143652">Warning</a></div>
<div class="Heading4"><a name="1143653">Cause</a></div>
<div class="Body"><a name="1072754">The 3ware RAID controller detected an unclean shutdown of the operating </a>system, either from a power failure or improper shutdown procedure. The controller will force the unit to begin verifying, due to the possibility that data on a redundant unit could be out of synchronization.</div>
<div class="Heading4"><a name="1210421">Action</a></div>
<div class="Body"><a name="1072763">Allow the verification to complete. Verifications have little overhead in terms </a>of system performance and keep your units in optimum condition.</div>
<div class="Body"><a name="1199802">To prevent unclean shutdowns, always go through the normal shutdown </a>procedure. It is also recommended to use an uninterruptible power supply (UPS) to prevent unclean shutdowns due to sudden power loss.</div>
<div class="Heading4"><a name="1143647">See Also</a></div>
<div class="Body"><a href="Maintain_Units.7.17.html#1080320" name="1143640">About Verification</a></div>
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