Thank you Perry Whittle

I was thinking that with the "timeout" option the failover would obligatory initiate after X seconds. In any situation.

Thanks

I think I found the answer at this link:

http://www.sqlmag.com/blog/sql-server-questions-answered-28/sql-server/why-isnt-the-mirroring-partner-timeout-working-137113

I was right. This only work with a windows failure in diferent servers.

Thanks for your time guys.

That's right.

I stopped the SQL Server Service of the Principal database instance.

You can get a trace on profile to take this values.

Buy the book SQL Server 2008 Internals.

Thanks for this link.