CV0-002 · 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. This question asks to identify a specific RAID level that provides data mirroring and can improve random read performance on a file system.
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
(39 responses)- A8% (3)
- B90% (35)
- D3% (1)
Why each option
This question asks to identify a specific RAID level that provides data mirroring and can improve random read performance on a file system.
RAID 0 (striping) offers no redundancy and, while it can increase both read and write performance, it does not provide mirroring.
RAID 1 creates a mirrored copy of data across two disks, meaning the exact same data exists on both drives, offering redundancy. This mirroring also enables improved random read performance because data can be read from either of the two identical disks, potentially allowing concurrent reads.
RAID 1+0 (RAID 10) combines mirroring and striping, providing both redundancy and performance, but RAID 1 is the most direct answer for a 'mirrored drive' with read performance benefits.
RAID 5 uses striping with distributed parity, providing redundancy and good read performance, but it does not create a direct mirrored copy of data like RAID 1.
Concept tested: RAID levels and performance
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/initialize-new-disks
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