What is the minimum number of 900W power supplies needed for a 2000W blade server chassis?

To determine the minimum number of 900W power supplies required for a 2000W blade server chassis, it's essential to understand both the total power requirements and the way power supplies function in redundancy and load distribution within server environments.

A blade server chassis that requires 2000W needs sufficient power not only to meet this demand but also to ensure reliability. In server environments, especially those concerned with uptime and continuous operation, it’s common practice to configure power supplies with redundancy. This typically means having enough power supplies to handle the total power load even if one fails.

In this case, a single 900W power supply is inadequate, as it would not cover the entire load of 2000W. While two 900W power supplies would sum to 1800W, this scenario would still leave a deficit of 200W, meaning under peak conditions, the server could risk not receiving adequate power. Therefore, at least three power supplies, totaling 2700W, are required. This not only meets the power demand but also allows for failover capability; if one supply fails, the remaining two can handle the load effectively.

Thus, choosing three 900W power supplies satisfies the need for both adequate power and enhanced reliability, justifying