SK0-003 · Question #87
There is a power outage and all servers are shut down properly by the uninterruptible power supply (UPS) software. When one of the servers starts up it displays a logical drive failed error. This…
The correct answer is D. Two failed drives. A 'logical drive failed' error on a RAID 5 array after a power outage most likely indicates that two drives have failed, which exceeds the redundancy capacity of RAID 5.
Question
There is a power outage and all servers are shut down properly by the uninterruptible power supply (UPS) software. When one of the servers starts up it displays a logical drive failed error. This server has two processors, 16GB of memory, and a RAID 5 array with 10 drives. Which of the following is the MOST likely cause?
Options
- AA failed RAID controller
- BTwo failed processors
- CTwo failed sticks of memory
- DTwo failed drives
How the community answered
(25 responses)- A4% (1)
- B4% (1)
- C8% (2)
- D84% (21)
Why each option
A 'logical drive failed' error on a RAID 5 array after a power outage most likely indicates that two drives have failed, which exceeds the redundancy capacity of RAID 5.
A failed RAID controller would typically prevent the system from seeing any logical drives or the array at all, rather than reporting a 'logical drive failed' specific to the array's status.
Two failed processors would prevent the server from booting or functioning at all, not specifically cause a 'logical drive failed' error after startup related to storage.
Two failed sticks of memory could cause boot issues or system instability, but it would not directly result in a 'logical drive failed' error related to the RAID array.
A RAID 5 array can only tolerate the failure of one drive; if two drives fail, the array becomes degraded and can no longer reconstruct data, leading to a 'logical drive failed' error as its redundancy is compromised.
Concept tested: RAID 5 fault tolerance
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