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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <title>About Putting the Oracle RAC Database Instances into the Correct State</title> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1 Build 135" /> <meta name="date" content="2009-06-04T14:31:50Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="About Putting the Oracle RAC Database Instances into the Correct State" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10743-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="racbureco008.htm" title="Previous" type="text/html" /> <link rel="next" href="tdprc_restore_arch_logs.htm" title="Next" type="text/html" /> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="racbureco008.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdprc_restore_arch_logs.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CHDEBEEG" name="CHDEBEEG"></a><a id="TDPRC278" name="TDPRC278"></a></p> <div class="sect3"> <h1>About Putting the Oracle RAC Database Instances into the Correct State</h1> <a name="BEGIN" id="BEGIN"></a> <p><a id="sthref260" name="sthref260"></a>Recovery of a failed instance in Oracle RAC is automatic. If an Oracle RAC database instance fails, then a surviving database instance processes the online redo logs generated by the failed instance to ensure that the database contents are in a consistent state. When recovery completes, Oracle Clusterware attempts to restart the failed instance automatically.</p> <p>Media recovery is a manual process that occurs while a database is closed. A media failure is the failure of a read or write operation of a disk file required to run the database, due to a physical problem with the disk such as a head malfunction. Any database file can be vulnerable to a media failure. If a media failure occurs, then you must perform media recovery to restore and recover the damaged database files. Media recovery is always done by one instance in the cluster.</p> <p>Before starting media recovery, the instance that will be performing the recovery should be started in <code>MOUNT</code> mode. The other instances should be started in <code>NOMOUNT</code> mode.</p> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="tdprc_start_stop_rac_inst.htm#BCEBGHHC">Starting and Stopping Oracle RAC Databases and Database Instances</a></p> <p><a href="racbureco007.htm#CEGCGAHF">About Preparing to Restore and Recover Your Oracle RAC Database</a></p> <p><a href="topicid:ADMQS098">Performing Oracle Advised Recovery</a></p> </div> </div> <!-- class="sect3" --> <!-- class="sect2" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 2006, 2009, Oracle and/or its affiliates. All rights reserved.</span><br /> <a href="./dcommon/html/cpyr.htm"><span class="copyrightlogo">Legal Notices</span></a></td> <td align="center"><a href="racbureco008.htm"><img src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdprc_restore_arch_logs.htm"><img src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> </div> <!-- class="footer" --> </body> </html>
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