Hi Vincent,
Sounds like its rebuilding a bunch of indexes after removing some data pages. Btw - everything that repair does is fully logged, regardless of your recovery model.
What were the errors you're trying to fix with repair? Don't you have backups to restore from instead? How big is the database?
Thanks
Paul Randal
CEO, SQLskills.com: Check out SQLskills online training!
Blog:www.SQLskills.com/blogs/paul Twitter: @PaulRandal
SQL MVP, Microsoft RD, Contributing Editor of TechNet Magazine
Author of DBCC CHECKDB/repair (and other Storage Engine) code of SQL Server 2005