Developers know code, and they know various facets of the business; and because they focus on those items daily, they are not spending time racking servers, installing routers, replacing hard disks, allocating space on the SAN, and so forth. Server administrators do those things, but they do not know how to code or build applications that will drive the business forward at the same speed as a developer.
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If you come across a developer that believes they know more than anyone else in the room, you can sit back and chuckle because you already know that the DBAs are the smartest, otherwise you wouldn’t always be called to fix their problems all day long.
With that responsibility, you will also find that you start getting more blame than credit for your work. I promise you this: no one will ever stop by your desk in the morning and thank you for the fact that everything ran smoothly last night.