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SK0-004 · Question #247

A datacenter has exceeded the load on the central uninterruptible power supply (UPS) for the room and is causing power load problems. Additional power is available, but not using the central UPS…

The correct answer is C. Add stand alone UPSs for new servers not wired off the central UPS. When a central UPS is overloaded, adding standalone UPS units for new servers is the safest temporary workaround that maintains battery backup protection without exceeding the central system's rated capacity.

Server hardware installation and management

Question

A datacenter has exceeded the load on the central uninterruptible power supply (UPS) for the room and is causing power load problems. Additional power is available, but not using the central UPS. Which of the following is the BEST temporary solution for adding new servers until an upgrade of the central UPS can occur?

Options

  • AContinue plugging into the central UPS, but put the UPS on bypass to avoid load problems.
  • BPlug the servers directly into the power that is not on the UPS.
  • CAdd stand alone UPSs for new servers not wired off the central UPS.
  • DContinue plugging into the central UPS because the actual load supported is actually higher

How the community answered

(33 responses)
  • A
    9% (3)
  • B
    3% (1)
  • C
    82% (27)
  • D
    6% (2)

Why each option

When a central UPS is overloaded, adding standalone UPS units for new servers is the safest temporary workaround that maintains battery backup protection without exceeding the central system's rated capacity.

AContinue plugging into the central UPS, but put the UPS on bypass to avoid load problems.

Placing the UPS on bypass completely removes battery backup and surge protection for all connected equipment, leaving the entire load vulnerable to outages and power events.

BPlug the servers directly into the power that is not on the UPS.

Plugging servers directly into non-UPS power provides no protection against outages, surges, or sags, which defeats the core purpose of having a UPS in a datacenter.

CAdd stand alone UPSs for new servers not wired off the central UPS.Correct

Standalone UPS units provide each new server with its own battery backup protection while routing power through the available non-UPS circuit, bypassing the overloaded central system entirely. This preserves power protection for the new equipment without adding any additional load to the already-strained central UPS. It is a recognized interim measure in datacenter power management used until a proper infrastructure upgrade can be completed.

DContinue plugging into the central UPS because the actual load supported is actually higher

If the UPS is already causing load problems it is operating at or beyond its rated capacity, and assuming hidden headroom risks damaging the unit and triggering a broader outage.

Concept tested: Datacenter UPS capacity management and power redundancy

Topics

#UPS#power management#datacenter power#standby power

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