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010-151 · Question #37

Which three statements about powering down a Cisco UCS C-Series Rack-Mount Server to perform maintenance or replacement are true? (Choose three.)

The correct answer is A. Standby power mode: Power is supplied only to the service processor and the cooling fans, and it C. Graceful shutdown: Press and release the power button. The operating system performs a D. Disconnect the power cords from the power supplies in your server to completely power off the. Cisco UCS C-Series servers support standby and main power modes, allow graceful OS shutdown via the power button, and require physical power cord removal for a complete power-off.

Cisco Data Center Equipment and Related Hardware

Question

Which three statements about powering down a Cisco UCS C-Series Rack-Mount Server to perform maintenance or replacement are true? (Choose three.)

Options

  • AStandby power mode: Power is supplied only to the service processor and the cooling fans, and it
  • BPower status LED. Green indicates that the server is in main power mode and can be safely
  • CGraceful shutdown: Press and release the power button. The operating system performs a
  • DDisconnect the power cords from the power supplies in your server to completely power off the
  • EOnly an emergency shutdown can be performed using the power button on the server front panel.
  • FThe Cisco UCS C-Series Rack-Mount Server has only one power mode.

How the community answered

(18 responses)
  • A
    72% (13)
  • B
    6% (1)
  • E
    6% (1)
  • F
    17% (3)

Why each option

Cisco UCS C-Series servers support standby and main power modes, allow graceful OS shutdown via the power button, and require physical power cord removal for a complete power-off.

AStandby power mode: Power is supplied only to the service processor and the cooling fans, and itCorrect

Standby power mode is a distinct power state on C-Series servers where only the service processor (CIMC) and cooling fans receive power, enabling remote management while the server is not in full operation.

BPower status LED. Green indicates that the server is in main power mode and can be safely

A green power status LED indicates the server is in main power mode and is actively running, meaning it is not safe to remove - amber indicates standby mode; the statement as presented misrepresents when removal is safe.

CGraceful shutdown: Press and release the power button. The operating system performs aCorrect

Pressing and immediately releasing the power button sends a graceful shutdown signal to the operating system, allowing it to complete an orderly shutdown sequence before main power is removed.

DDisconnect the power cords from the power supplies in your server to completely power off theCorrect

Because CIMC continues to draw standby power even when the server is not in main power mode, physically disconnecting all power cords from the power supplies is the only way to achieve a complete, zero-power state for safe maintenance.

EOnly an emergency shutdown can be performed using the power button on the server front panel.

The front-panel power button supports both a graceful shutdown (press and release) and an emergency forced shutdown (press and hold for several seconds), so it is not limited to emergency use only.

FThe Cisco UCS C-Series Rack-Mount Server has only one power mode.

Cisco UCS C-Series servers have at least two power modes - main power mode and standby power mode - making this statement factually incorrect.

Concept tested: Cisco UCS C-Series server power modes and safe shutdown procedures

Source: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c/hw/C220M6/install/C220M6.html

Topics

#C-Series#rack-mount server#power management#shutdown procedure

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