Hi Stefan,
are you aware of the existing Rack shapes created by Jaroslav Benkovsky?
http://dia-installer.de/shapes/Racks/index.html
In case these shapes are not what you are looking for: Are you aware of
the shape creation tutorial?
http://dia-installer.de/howto/create_shape/index.html.en
You
Currently i still use Visio for making rack layouts (patchracks with
active and passive networking components) but I would like to switch to
Dia since I'm a full time ubuntu user. Is this possible? Is there anyway
I can help with drawing the components for the rack? Or anything else I
can help with