Depends on the center and how its run. Some of them are very human accommodating, and seem to understand that today's engineers might be tomorrows customers.

Depends on the center and how its run. Some of them are very human accommodating, and seem to understand that today's engineers might be tomorrows customers. Others seem to go out of their way to create anti human environments. Hot aisle is literally 38cm wide? Doors wont open? Lifting tools are in an undocumented location? Rack uprights randomly unscrewed? Specific permission required to open a roller door so you have to wait 3 hours for an escalation request to be processed before you can reach the guy on the other side. 24/7 access conditional on the 1 security guard for 3 data centres being available to let you in. My favorite was the one that had declared bankruptcy with our hardware still inside. No staff(despite 24/7 staff guarantee), but we had some limited after hours access pass. Between the pass, some keys we "found" + friendly landlord disabling the alarm system for us, we got in, saw fans operating in place of the aircon, dismantled our rack and bailed.