Mirroring SQL 2008 database

This is the first time I am working with mirroring.  I understand the concept but don't understand technicals.  I know I need to servers, one primary and then the mirror.  I was told that SQL does not need to be installed on the mirror.  Is this true?

I do understand the witness server part.
darovitzAsked:
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lcohanConnect With a Mentor Database AnalystCommented:
No - its not true, you must have SQL Server running on both primary and secondary.

Starting 2005 and up:

"Make sure that the two partners, that is the principal server and mirror server, are running the same edition of Microsoft SQL Server 2005. The partners require either SQL Server 2005 Standard Edition or SQL Server 2005 Enterprise Edition."



http://technet.microsoft.com/en-us/library/ms366349(v=sql.90).aspx




For 2008: "•Make sure that the two partners, that is the principal server and mirror server, are running the same edition of Microsoft SQL Server."

http://technet.microsoft.com/en-us/library/ms366349(v=sql.100).aspx
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