GSLC · Question #312
Which of the following RAID levels is supported by an operating system?
The correct answer is C. RAID 0. RAID 0 (disk striping) is the RAID level most commonly supported directly by operating systems through software RAID, as it requires no parity computation.
Question
Which of the following RAID levels is supported by an operating system?
Options
- ARAID 4
- BRAID 6
- CRAID 0
- DRAID 3
How the community answered
(35 responses)- A3% (1)
- B3% (1)
- C89% (31)
- D6% (2)
Why each option
RAID 0 (disk striping) is the RAID level most commonly supported directly by operating systems through software RAID, as it requires no parity computation.
RAID 4 uses block-level striping with a dedicated parity disk, creating a write bottleneck on the parity disk that makes it impractical to implement efficiently in OS software RAID.
RAID 6 requires dual distributed parity calculations across all disks, a computationally intensive operation generally requiring dedicated hardware RAID controllers rather than OS-level software.
RAID 0 stripes data across multiple disks without any parity calculation, making it straightforward to implement in operating system software. Windows, Linux (via mdadm), and macOS all provide native RAID 0 support without requiring dedicated hardware controllers. Its simplicity contrasts with RAID 3, 4, and 6, which involve parity operations that typically demand hardware acceleration.
RAID 3 requires synchronized disk spindles and byte-level striping with a dedicated parity disk, making it impractical for OS software RAID and suited only to specialized hardware controllers.
Concept tested: Operating system software RAID level support
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/overview-of-disk-management
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