Crucial Exams

CompTIA Server+ SK0-005 Practice Question

During a night-shift health check, a server administrator finds that a 12-bay rack server running a hardware-based RAID 6 virtual disk has gone offline. The RAID controller's logs show that bays 1-4 all became "missing" within the same second, while the other eight bays continued to function normally.

  • Each of the four drives that went missing passes SMART diagnostics when they are connected to an external test jig on another system.
  • Swapping a known-good drive into any of the first four bays results in the same "drive not present" message.
  • The internal mini-SAS cable between the RAID controller and the drive cage has been reseated, the controller firmware is current, and the server's power supplies report nominal voltages.

Which of the following is the MOST likely root cause of the outage?

  • Incompatible firmware versions on the four hard drives

  • Failure of the disk-cage backplane that serves bays 1-4

  • A depleted or faulty cache battery on the RAID controller

  • Corrupted RAID metadata written to the affected disks

CompTIA Server+ SK0-005
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