Sql-server – Rebuild master in SQL Express 2008

According to the SQL Server 2005 Express edition overview:

there are no limits to the number of databases that can be attached to the server.

So, the limit is how much performance you can utilise of the server. Consider that as the express edition will only use one CPU core, if you have a quad core processor it can not use more than 25%.

If you later on find that you need to utilise more of the server's performance, you can quite easily upgrade to a different version of SQL Server.

WEll.. I did it this way: I've installed a new SQL instance on that machine and I've rewritten the old corrupted master.mdf from the old SQL instance with the new fresh one. That allowed me to start the server. Then I attached myDatabase.mdf .. The disadvantage is that I have master.dbf 'from factory / default'