Today we are announcing some important and exciting changes to our software boundaries and limits for SharePoint 2010 Products, in summary SharePoint 2010 Products will now support content databases up to 4TB. However, prior to considering multi-terabyte databases you should thoroughly review the following whitepapers:
Managing multi-terabyte databases with SharePoint 2010 (http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=26700)
Managing large content databases with SharePoint 2010 requires careful planning and consideration to include capacity management, performance, and data protection. This whitepaper provides guidance to support these considerations to include additional resources to support this guidance.
Database Maintenance for SharePoint 2010 Products (http://www.microsoft.com/download/en/details.aspx?id=24282)
This white paper provides information and guidelines for maintaining the databases that host Microsoft® SharePoint® 2010 data and configurations. It describes and provides examples of the database maintenance tasks that we recommend when using SharePoint 2010.
Before you implement any database maintenance tasks or modify your SharePoint 2010 databases, read the following support article: Support for changes to the databases that are used by Office server products and by Windows SharePoint Services (http://go.microsoft.com/fwlink/?LinkId=110812&clcid=0x409).
To learn more about this announcement see the SharePoint Team Blog at http://sharepoint.microsoft.com/blog.
To learn more about the new software boundaries and limits see SharePoint Server 2010 capacity management: Software boundaries and limits at http://technet.microsoft.com/en-us/library/cc262787.aspx.