A technician is replacing a fan on a mission critical PowerEdge R740 server that needs to stay operational. The server has no LCD. How can the technician determine which fan needs to be replaced?

Question

Options

• ARun embedded diagnostics to locate the failing fan
• BAccess the Lifecycle Controller, navigate to the System > Cooling section to locate the failing fan
• CRemove the chassis cover and observe a fan with an amber LED
• DUse the iDRAC GUI to locate failing fan number

• A
  6% (2)
• B
  8% (3)
• C
  3% (1)
• D
  83% (30)

Explanation

Option D is correct because iDRAC (Integrated Dell Remote Access Controller) provides out-of-band, remote access to server health data - including fan status, fan slot numbers, and fault indicators - without interrupting server operations, making it ideal for mission-critical environments.

Why the distractors fail:

• A (Embedded Diagnostics): ePSA/SupportAssist diagnostics require a system reboot to run, which would take the mission-critical server offline - a non-starter.
• B (Lifecycle Controller): The Lifecycle Controller is accessed by pressing F10 during POST, meaning it also requires a reboot. It's a powerful tool, but not for live systems.
• C (Amber LED on chassis): While Dell fans do have amber fault LEDs, physically opening the chassis of a live, mission-critical server is poor practice and introduces risk. More importantly, iDRAC can identify the fan before you ever touch the hardware - the right workflow is identify first, then act.

Memory tip: Think of iDRAC as the server's "always-on remote control" - it runs independently of the OS and the server's power state. Whenever an exam question involves identifying or diagnosing a Dell server issue without downtime, iDRAC GUI is almost always the answer.

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