Yeah, there is a lot of white. Makes it seem incomplete.
You have "yourcompany" on 3 areas, top logo, server/oval, and the welcome to text box. That might be a little over doing it. Having the company name on the logo should be sufficient.
The ovals superimposed with the server picture doesn't seem to fit well for me. The packages on the right can use some kind of border since you are using light colors and a white background (you want to give it some kind of stand out). The top section (header) of the site works; your selection of colors is good.
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