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SK0-003 · Question #195

A server has a single failed hard drive in an array that is accessed through a hot plug backplane to ease replacement of failed drives. After replacing the drive several times, each of the…

The correct answer is A. The backplane has failed and needs to be replaced. If multiple replacement hard drives fail to power up or rebuild in a hot-plug array, the most likely cause is a failure of the backplane itself, which provides power and data connectivity.

Troubleshooting

Question

A server has a single failed hard drive in an array that is accessed through a hot plug backplane to ease replacement of failed drives. After replacing the drive several times, each of the replacement drives failed to power up and rebuild as the failed drive. Which of the following is the MOST likely cause of the failures?

Options

  • AThe backplane has failed and needs to be replaced.
  • BThe array must be disbanded and recreated from a backup source to recognize the
  • CThere is a conflict with the optical drive on the server.
  • DThe server power supply is failing and not providing enough power for all the drives.

How the community answered

(40 responses)
  • A
    60% (24)
  • B
    13% (5)
  • C
    23% (9)
  • D
    5% (2)

Why each option

If multiple replacement hard drives fail to power up or rebuild in a hot-plug array, the most likely cause is a failure of the backplane itself, which provides power and data connectivity.

AThe backplane has failed and needs to be replaced.Correct

If multiple new drives fail to power up or integrate into the array via a hot-plug backplane, the backplane itself is the most likely single point of failure. The backplane is responsible for distributing power and data signals to the drives, so its failure would prevent any installed drive from functioning correctly.

BThe array must be disbanded and recreated from a backup source to recognize the

The array configuration itself is unlikely to be the cause if the drives are not even powering up, and disbanding/recreating the array is an extreme measure usually for logical corruption, not physical power issues.

CThere is a conflict with the optical drive on the server.

A conflict with an optical drive is highly improbable to cause multiple hard drives in a RAID array to fail to power up or rebuild, as they operate on different buses and power delivery systems.

DThe server power supply is failing and not providing enough power for all the drives.

While a failing power supply could cause drive issues, if only new drives are failing to power up after being inserted into specific slots, the backplane is a more localized and probable failure point than the entire power supply failing for all drives.

Concept tested: Hardware troubleshooting - RAID backplane failure

Topics

#hardware troubleshooting#RAID array#hot-plug backplane#power issues

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