SK0-005 · Question #589
SK0-005 Question #589: Real Exam Question with Answer & Explanation
The correct answer is C: RAID 6. RAID 6 is the most cost-effective solution for large drives that protects against two simultaneous drive failures, which is critical during lengthy rebuild processes.
Question
A database server recently experienced a drive failure. Due to the large 8TB drive sizes, the RAID 5 rebuild time was excessive. Which of the following RAID methods would protect against additional drive failures during rebuilds and cost the least?
Options
- ARAID 0
- BRAID 1
- CRAID 6
- DRAID 10
Explanation
RAID 6 is the most cost-effective solution for large drives that protects against two simultaneous drive failures, which is critical during lengthy rebuild processes.
Common mistakes.
- A. RAID 0 provides no fault tolerance and would result in complete data loss with a single drive failure, failing to meet the protection requirement.
- B. RAID 1 provides fault tolerance against a single drive failure through mirroring but does not offer protection against a second failure during a rebuild and is less space-efficient for large datasets than RAID 6.
- D. RAID 10 provides robust fault tolerance but requires 50% of the total disk space for redundancy (mirroring), making it more expensive than RAID 6 in terms of storage capacity.
Concept tested. RAID levels fault tolerance and cost efficiency
Reference. https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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