SK0-004 · Question #313
Which of the following would be the BEST configuration when using seven SCSI drives in order to have full fault tolerance?
The correct answer is D. RAID 5. RAID 5 is the best fit for seven drives with full fault tolerance. It requires a minimum of 3 drives, works efficiently with any number of drives, and distributes parity data across all drives in the array - allowing the array to survive the failure of exactly one drive. With 7…
Question
Which of the following would be the BEST configuration when using seven SCSI drives in order to have full fault tolerance?
Options
- ARAID 0+1
- BRAID 0
- CRAID 1
- DRAID 5
How the community answered
(30 responses)- A3% (1)
- B13% (4)
- C7% (2)
- D77% (23)
Explanation
RAID 5 is the best fit for seven drives with full fault tolerance. It requires a minimum of 3 drives, works efficiently with any number of drives, and distributes parity data across all drives in the array - allowing the array to survive the failure of exactly one drive. With 7 drives, RAID 5 provides 6 drives worth of usable storage plus 1 drive's worth of distributed parity. RAID 0 has zero fault tolerance. RAID 1 (pure mirroring) would waste drives and only works cleanly in pairs. RAID 0+1 requires an even number of drives (e.g., 6 or 8), making it incompatible with 7 drives. RAID 5 is the practical, efficient, and fault-tolerant choice for an odd number like 7.
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