220-1101 · Question #427
A technician needs to provide data redundancy on a user's workstation. Which of the following RAID levels provides redundancy with the FEWEST disks?
The correct answer is B. RAID 1. RAID 1 offers data redundancy using only two disks by mirroring data across them, making it the RAID level requiring the fewest disks for redundancy.
Question
A technician needs to provide data redundancy on a user's workstation. Which of the following RAID levels provides redundancy with the FEWEST disks?
Options
- ARAID 0
- BRAID 1
- CRAID 5
- DRAID 10
How the community answered
(43 responses)- A2% (1)
- B93% (40)
- D5% (2)
Why each option
RAID 1 offers data redundancy using only two disks by mirroring data across them, making it the RAID level requiring the fewest disks for redundancy.
RAID 0 (striping) offers no data redundancy; it combines disks for performance but loses all data if any single disk fails.
RAID 1 (mirroring) provides data redundancy by duplicating data across two disks. If one disk fails, the data is still available on the other, and it requires a minimum of two disks, which is the fewest among RAID levels that offer redundancy.
RAID 5 (striping with parity) provides redundancy but requires a minimum of three disks to implement its parity-based protection scheme.
RAID 10 (striped mirrors) provides both performance and redundancy but requires a minimum of four disks to create mirrored pairs that are then striped.
Concept tested: RAID levels and disk requirements for redundancy
Source: https://learn.microsoft.com/en-us/windows-server/storage/whats-new-in-storage#raid-5-parity-storage-spaces
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