The only evidence that a data warehouse is on-site is the cooling and supplementary power units. Here is a snapshot.
On the left are the backup power generators; on the right is the huge cooling unit. In the center, not shown in this photo, is an indent in the ground. This area contains skylights for the entryway of the facilities. The warehouse is carefully guarded with redundancies, several locked doors requiring advancing, levels of access granted.
My new work area is located just behind the set of windows at the bottom right of the photo (the second floor). I am writing logic for the software developers to trigger disposition of records according to the records retention schedule. The files that are being controlled are located within the data warehouse – safe and secure – with proper redundancies, disaster plans, and security measures in place.