SK0-005 · Question #592
A technician receives reports that a file server is performing slower than usual after a power failure. While investigating the issue, the technician discovers the write cache was disabled. The…
The correct answer is C. The RAID controller battery failed. Write caching improves disk performance by temporarily storing write operations in faster cache memory before writing to disk. However, to prevent data loss during power failures, write caching relies on a battery-backed cache. If the RAID controller's battery fails, the system…
Question
A technician receives reports that a file server is performing slower than usual after a power failure. While investigating the issue, the technician discovers the write cache was disabled. The technician checks a server configuration document and confirms the cache was previously enabled. Which of the following events most likely caused this change?
Options
- AThe cache hit rate was high.
- BThe volume reaches 100% capacity.
- CThe RAID controller battery failed.
- DA drive in the array was replaced.
How the community answered
(48 responses)- A8% (4)
- B4% (2)
- C71% (34)
- D17% (8)
Explanation
Write caching improves disk performance by temporarily storing write operations in faster cache memory before writing to disk. However, to prevent data loss during power failures, write caching relies on a battery-backed cache. If the RAID controller's battery fails, the system may automatically disable write caching to protect data integrity, leading to reduced performance.
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