解决方法：
1. Open SQL Management and Stop the TFS Analysis Service on the TFS Data Tier.
2. Go to "C:\Program Files\Microsoft SQL Server\MSAS10.MSSQLSERVER\OLAP\Data" on the TFS Data Tier, and delete the folder TFSWarehouse.0.db and the XML file TFSWarehouse.0.db.xml
3. Start the TFS Analysis Service on the TFS Data Tier.
4. Run the following command on the TFS Data Tier to rebuild the cube, it can be found in "C:\Program Files\Microsoft Visual Studio 2008 Team Foundation Server\Tools"SetupWarehouse -o -s TFSServer -d TFSWarehouse -c warehouseschema.xml -a TFSServiceAccount -ra TFSReportsAccount -mturl http://TFSServer:8080
http://abadawi.blogspot.com/2007/01/tfswarehouse-cube-corruption.html