To upgrade a 90-day evaluation license to an unlimited version on servers where you installed an evaluation version of ZfS, click Upgrading a 90-day Evaluation License to an Unlimited License on the Novell Documentation Web site.
You can check how many days are left on a 90-day license by entering zfsversion -license on a server's command line.
This will display the current license information. If "License: Unlimited" is displayed, the reinstallation worked for that purpose.