Verification: Verify upgrade for the first database
After you have attached a database, you can use the Upgrade Status page in Central Administration to check the status of upgrade on your site collections. After the upgrade process is complete, you can review the upgrade log file to see whether there were any issues during upgrade. Also, you can review each upgraded site to find and address any issues with how the content is displayed. For more information, see Verify upgrade and review upgraded sites (SharePoint Server 2010).
To view the Upgrade Status page
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In Central Administration, click Upgrade and Migration, and then click Check upgrade status.
To open the upgrade log file
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The upgrade error log file and the upgrade log file are located at %COMMONPROGRAMFILES%\Microsoft Shared\web server extensions\14\LOGS. The logs are named in the following format: Upgrade-YYYYMMDD-HHMMSS-SSS-error.log and Upgrade-YYYYMMDD-HHMMSS-SSS.log, where YYYYMMDD is the date and HHMMSS-SSS is the time (hours in 24-hour clock format, minutes, seconds, and milliseconds). An example for an upgrade error log is Upgrade-20090415-132126-374-error.log, and an example for an upgrade log is Upgrade-20090415-132126-374.log.
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