A redundant power supply system in a high-availability server environment is primarily designed to provide a failover option in the event of a power supply unit (PSU) failure. This ensures that the server continues to operate, significantly reducing downtime. Other advantages like improved efficiency or increased power output can be misinterpreted as primary benefits but they are secondary to the need for redundancy, which focuses mainly on maintaining uptime in response to PSU failures.
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What is a power supply unit (PSU) and what does it do?
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How does failover work in a server with redundant power supplies?