This custom condition checks the SQL Server to verify that Tace Flag 1117 has been enabled globally for the instance, this Trace Flag is typically used in conjunction where TempDb has multiple files.
Trace Flag 1117 changes the default behaviour of SQL Server so that in the event of an Auto-growth event, where a file group has more than one file, that all of the files will grow. This is opposed to each file growing independently as each fills. It is important to ensure that all of the files in a file group start at the same size, have the same growth increments and then grow at the same time. This preserves the ability of SQL Server to use its proportional fill algorithm to allocate data equally into the files.
More information on Trace Flag 1117 can be found at the following links;
https://support.microsoft.com/en-us/kb/2154845
http://www.sqlskills.com/blogs/paul/tempdb-configuration-survey-results-and-advice/
