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CompTIA

SK0-003 · Question #88

An administrator reboots a ten drive server, with a RAID 10 array, after a power failure and receives an error logical drive failed. Which of the following is the MOST likely cause?

The correct answer is B. Backplane failure. A 'logical drive failed' error on a RAID 10 array after a power failure in a ten-drive server is most likely caused by a backplane failure affecting multiple drives.

Troubleshooting

Question

An administrator reboots a ten drive server, with a RAID 10 array, after a power failure and receives an error logical drive failed. Which of the following is the MOST likely cause?

Options

  • ACorrupt file system table
  • BBackplane failure
  • CMultiple drive failure
  • DBad cable

How the community answered

(28 responses)
  • A
    7% (2)
  • B
    75% (21)
  • C
    14% (4)
  • D
    4% (1)

Why each option

A 'logical drive failed' error on a RAID 10 array after a power failure in a ten-drive server is most likely caused by a backplane failure affecting multiple drives.

ACorrupt file system table

A corrupt file system table would typically result in OS boot issues or data access problems within the OS, not a 'logical drive failed' error from the RAID controller during boot.

BBackplane failureCorrect

A backplane failure can simultaneously affect connectivity to multiple drives within the RAID 10 array, causing the array to report a 'logical drive failed' error after a power cycle as it loses access to essential components needed for the array to function.

CMultiple drive failure

While multiple independent drive failures could cause this, a power failure is less likely to cause simultaneous independent failures of multiple drives in a manner that exceeds RAID 10's high fault tolerance compared to a single point of failure like a backplane.

DBad cable

A single bad cable would typically only affect one drive or a subset of drives, and while it could degrade the array, it is less likely to cause a complete 'logical drive failed' error for a large RAID 10 setup after a power cycle than a backplane failure affecting many drives.

Concept tested: RAID 10 failure scenarios

Topics

#RAID 10#logical drive failure#backplane failure#power failure

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