SK0-003 · Question #227
An administrator needs the fastest read/write capabilities with the most redundancy, cost is not a factor. The current data requirement is 750GB but will double in the next year. Which of the…
The correct answer is D. Use RAID 10 with ten 300GB hard drives. For the fastest read/write capabilities with the most redundancy, without cost constraints and with future growth in mind, RAID 10 is the optimal choice.
Question
An administrator needs the fastest read/write capabilities with the most redundancy, cost is not a factor. The current data requirement is 750GB but will double in the next year. Which of the following BEST meets these requirements?
Options
- AUse RAID 1 with ten 300GB hard drives.
- BUse RAID 6 with seven 300GB hard drives.
- CUse RAID 5 with six 300GB hard drives.
- DUse RAID 10 with ten 300GB hard drives.
How the community answered
(25 responses)- A12% (3)
- B4% (1)
- C20% (5)
- D64% (16)
Why each option
For the fastest read/write capabilities with the most redundancy, without cost constraints and with future growth in mind, RAID 10 is the optimal choice.
RAID 1 offers high redundancy but does not provide the striping performance benefits of RAID 10 for read/write speeds, even with ten drives organized into five mirrored pairs.
RAID 6 offers good redundancy (dual parity) and capacity (seven 300GB drives yield 1500GB usable space), but its write performance is typically slower than RAID 10 due to the overhead of parity calculations.
RAID 5 offers single-drive redundancy and capacity (six 300GB drives yield 1500GB usable space), but it provides less redundancy and generally lower write performance than RAID 10, especially during rebuilds.
RAID 10 (or RAID 1+0) combines mirroring (RAID 1) for excellent redundancy and striping (RAID 0) for high performance, offering the fastest read/write speeds and high fault tolerance. Using ten 300GB drives in a RAID 10 configuration provides 1500GB of usable storage (5 mirrored pairs striped together), which meets the current requirement and allows for future doubling.
Concept tested: RAID levels and their characteristics
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