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HP0-J73 · Question #166
HP0-J73 Question #166: Real Exam Question with Answer & Explanation
The correct answer is D: RAID 6. RAID 6 uses dual distributed parity, allowing the array to survive any two simultaneous drive failures without data loss, making it the correct choice when two-drive fault tolerance is required.
Understanding HP Storage Components and Technologies
Question
A system administrator at an enterprise company wants to extend the storage array of a server by using existing older disk drives. Because of the smaller size of the older drives, the administrator needs at least 18 physical disks. The company needs to ensure that if two drives fail simultaneously, no data loss occurs. Which RAID level should the system administrator use to configure the drives?
Options
- ARAID 1+0
- BRAID 3
- CRAID 5
- DRAID 6
Explanation
RAID 6 uses dual distributed parity, allowing the array to survive any two simultaneous drive failures without data loss, making it the correct choice when two-drive fault tolerance is required.
Common mistakes.
- A. RAID 1+0 mirrors data across pairs of drives and can tolerate one failure per mirrored pair, but two simultaneous failures on drives in the same mirror pair will result in data loss.
- B. RAID 3 uses a single dedicated parity drive and can only tolerate the failure of one drive at a time; a second simultaneous failure causes complete data loss.
- C. RAID 5 distributes a single parity block across all drives and can recover from only one drive failure; a second simultaneous drive failure destroys the array and results in data loss.
Concept tested. RAID 6 dual parity and two-drive fault tolerance
Topics
#RAID 6#dual drive failure tolerance#RAID levels#fault tolerance
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