CompTIA Server+ (SK0-005)Server Hardware Installation and ManagementMedium
A server technician is deploying a new server with multiple storage drives. The client requires a RAID configuration that provides fault tolerance against two simultaneous drive failures and offers high read performance. Write performance is less critical but still important. Which RAID level should the technician implement?
- ARAID 0
- BRAID 5
- CRAID 6
- DRAID 1
Show answer & explanationAnswer & explanation
Correct answer: C. RAID 6
RAID 6 provides fault tolerance against two simultaneous drive failures by using double parity, making it suitable for situations where data integrity is paramount even with multiple drive losses. It offers good read performance and acceptable write performance.
Why the other options are wrong
- A. RAID 0 offers no fault tolerance, which contradicts the client's requirement.
- B. RAID 5 provides fault tolerance for a single drive failure, not two simultaneous failures.
- D. RAID 1 provides fault tolerance for a single drive failure, not two simultaneous failures.
RAID 6
A RAID level that provides fault tolerance against two simultaneous drive failures by distributing data and two independent parity blocks across all drives in the array.
- Minimum of 4 drives required.
- High fault tolerance (two drive failures).
- Good read performance, but write performance is lower than RAID 5 due to double parity calculations.
- Usable capacity is (N-2) * drive_size.
Memory trick: RAID 6 is for 'Double Trouble' drive failures.