SK0-003 · Question #179
An administrator needs to maintain 1TB of storage space for a server. A performance critical application will use this storage space for a database. The database will be replicated between multiple se
The correct answer is C. RAID 0 with four 250GB hard drives. RAID 0 with four 250GB drives provides the exact 1TB needed, offering the best performance and lowest cost per GB, with local fault tolerance being unnecessary due to external database replication.
Question
An administrator needs to maintain 1TB of storage space for a server. A performance critical application will use this storage space for a database. The database will be replicated between multiple servers. Cost and performance are the most important considerations. Which of the following RAID configurations would be the BEST choice for the storage array?
Options
- ARAID 6 with six 250GB hard drives
- BRAID 5 with five 250GB hard drives
- CRAID 0 with four 250GB hard drives
- DRAID 10 with eight 250GB hard drives
How the community answered
(41 responses)- A10% (4)
- B29% (12)
- C46% (19)
- D15% (6)
Why each option
RAID 0 with four 250GB drives provides the exact 1TB needed, offering the best performance and lowest cost per GB, with local fault tolerance being unnecessary due to external database replication.
RAID 6, while providing 1TB of storage, has lower write performance due to dual parity and uses more drives (6 drives) than RAID 0, making it less optimal for cost and raw performance.
RAID 5 provides 1TB of storage, but its performance is not as high as RAID 0, and it uses five drives, making it slightly less cost-effective than RAID 0 for the given scenario.
RAID 0 provides the highest performance and uses the fewest drives (4 x 250GB = 1TB) to meet the capacity requirement, thus being the most cost-effective. The 'database will be replicated between multiple servers' clause indicates that local fault tolerance is handled by the application layer, making RAID 0's lack of local fault tolerance acceptable.
RAID 10 offers excellent performance but requires eight drives to achieve 1TB, making it significantly more expensive than RAID 0, failing on the 'cost' consideration.
Concept tested: RAID levels, performance, cost, external replication
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/understanding-raid
Topics
Community Discussion
No community discussion yet for this question.