A file server must stay powered on while a technician pulls one power supply out. Which power design allows that?
Select an answer to reveal the explanation.
Short Explanation
You want a second engine, not a bigger single engine and not tidier hoses. Redundant power supplies let you pull one unit while the other keeps the server up. A larger lone supply, nicer cables, or an extra rail inside the same box still dies when that one box is pulled.
Full Explanation
Redundant power supplies are independent units. When one is removed, the other continues to feed the server, which is the behavior the maintenance window needs. A single supply with a higher wattage rating can run a heavier load and still goes dark the moment it is unplugged. Modular cables only change how the leads attach to one supply. Unplugging that supply still removes all power. A second 12-volt rail is an output section inside one supply. It is not a second supply you can pull, and losing the unit loses both rails. Exam caveat: the remaining supply has to be rated to carry the server alone. Two undersized supplies that only work as a pair will still shut down when one is removed. Operational check: confirm both supplies are healthy, pull one, and watch the server stay up before you call the design redundant. Pull the supply only after both units show healthy, and stop if the server drops. Label both supplies so the next pull is the unit that was just serviced. Stop the test if the server drops when one supply is pulled.