You need to replace a broken fan in the Backup Module with Fan BKMF21 on a VSP E1090. What is the correct procedure?

Question

Options

• AUse the MPC to remove the power from the backup module, and when the fan has stopped
• BGo directly to the system and replace the faulty fan.
• CUse the Maintenance Utility for stopping the fan, then replace it.
• DUse Storage Navigator to put the Backup Module into replacement mode, then replace the fan.

• A
  7% (3)
• C
  4% (2)
• D
  89% (40)

Explanation

On the VSP E1090, fan replacement in the Backup Module is a controlled procedure that requires Storage Navigator to place the module into replacement mode first - this safely prepares the system, ensures no data loss, and signals the hardware that maintenance is in progress before you physically touch any component. Option D is correct because Hitachi's official procedure mandates this software-initiated handshake before hardware intervention.

Why the distractors are wrong:

• A is incorrect because the MPC (Maintenance PC) is not the tool used to remove power for this specific operation - power management for the Backup Module fan replacement goes through Storage Navigator, not direct MPC commands.
• B is dangerous: going directly to the system without first putting the module into replacement mode risks operational errors, potential data integrity issues, and violates Hitachi's maintenance protocol.
• C is a plausible-sounding distractor, but there is no "Maintenance Utility" fan-stop function in this context - the correct interface is Storage Navigator, not a separate utility.

Memory tip: Think "Navigator before screwdriver" - on VSP systems, Storage Navigator is always your first stop before touching any field-replaceable unit (FRU). The pattern is: software mode change → physical replacement → software confirmation.

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