Hello Thing,
Could you post the error messages that you get when run the job?
Maybe the "_onefs_ = no" directive should be configured in your fileset. The default is yes, so bacula will not descend into different file systems and It seems your "/" and "nfs01" are different filesystems.
Also, this should be corrected: "File = /nonexistant/path/to/file/archive/dir". I´m quite sure you will not have this directory in your filesystem.
Best regards,
Ana