I just upgraded a large SQL 2000 database server to SQL 2005, and I have 2 databases that won't attach to the 2005 Server. They are both very small, about 90MB in size, and when I attach them to 2005, the process alternates between running and spinloop status. It can sit forever, and will never complete. I restored backups before the upgrade to a SQL 2000 Server, and reran DBCC CheckDB on both, and got no consistency errors, Updated Stats and indexes, then detached and moved the data files to 2005, and same thing.
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