Your welcome! Actually, I believe you can use any DVD/CD as long as it is a data CD/DVD (don't use a music cd). You may want to double check the text to be sure. All it is doing is check to see if you have physical access to the system. The assumption being if you have physical access then you must be trusted to a certain extent?
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Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.