You can only recover catalogs to a server with same hostname, same NBU installation path and same version and patch level.

There is no 'promote media server to master' other than renaming media server to master server hostname and re-installing as master, followed by catalog recovery.

Disaster recovery and master server recovery is covered in NBU Troubleshooting Guide.
You did not mention your NBU version - links to all NBU manuals can be found in 'Handy NBU links' in my signature.

Hope this helps!

as usual, Marianne is spot on. The troubleshooting guide is very well written and definitely worth the time to read. This forum probably is not the place to be planning your DR plan/procedures. There are so many different steps for different architecture. You may already have a DR team, if not then a company wide effort should be initiated involving all support groups. Its a big operation. but if it is a single instance of rebuilding just the master server after a crash, or whatever, then get thee to the library :-)

Thank you for the quick responses! I really appreciate it. These questions were requested by my supervisor. We do already have some DR plans in place, but we want to make some changes which depended on the answers given.

Thank you for the links! I will look into them.

ayep, DR is one thing and some companies have wonderful DR plans, but sometimes they overlook losing a single media server, data domain or whatever. Best to be prepared in advance as it is much easier to follow a well thought out plan instead of making one up as you go. Especially if your management like to park it right where you are trying to work.