CV0-003 · Question #380
Which of the following RAID levels is used to create a mirrored drive and can increase random read performance on the file system?
The correct answer is B. RAID 1. RAID 1 mirrors data identically across two drives, providing redundancy and the potential to distribute read operations across both drives for improved random read performance.
Question
Which of the following RAID levels is used to create a mirrored drive and can increase random read performance on the file system?
Options
- ARAID 0
- BRAID 1
- CRAID 1 + 0
- DRAID 5
How the community answered
(17 responses)- B94% (16)
- C6% (1)
Why each option
RAID 1 mirrors data identically across two drives, providing redundancy and the potential to distribute read operations across both drives for improved random read performance.
RAID 0 stripes data across drives for maximum performance with no redundancy and creates no mirror, meaning any single drive failure results in total data loss.
RAID 1 writes identical data to two separate drives simultaneously, creating a full mirror. Because both drives hold the same data, read requests can be serviced from either drive independently, which can increase random read throughput and reduce latency without any data loss risk.
RAID 1+0 combines mirroring and striping but requires a minimum of four drives and is a nested level, not the fundamental mirroring RAID level the question targets.
RAID 5 distributes parity data across three or more drives to provide fault tolerance through parity reconstruction, not through mirroring.
Concept tested: RAID 1 mirroring and random read performance
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance
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