SY0-301 · Question #834
Which of the following provides the LEAST availability?
The correct answer is A. RAID 0. RAID 0 stripes data across multiple disks with no redundancy whatsoever, so a single disk failure results in complete data loss and zero availability.
Question
Which of the following provides the LEAST availability?
Options
- ARAID 0
- BRAID 1
- CRAID 3
- DRAID 5
How the community answered
(46 responses)- A89% (41)
- B7% (3)
- C2% (1)
- D2% (1)
Why each option
RAID 0 stripes data across multiple disks with no redundancy whatsoever, so a single disk failure results in complete data loss and zero availability.
RAID 0 (striping) distributes data across two or more disks to improve read/write performance but provides no fault tolerance - there is no mirroring, parity, or redundancy. If any single drive in a RAID 0 array fails, all data in the array is lost immediately, giving it the lowest availability of all RAID levels listed.
RAID 1 (mirroring) writes identical data to two or more disks simultaneously, meaning the array survives the failure of all but one disk and provides high availability.
RAID 3 uses bit-level striping with a dedicated parity disk, allowing the array to survive and recover from a single disk failure, providing fault tolerance.
RAID 5 uses block-level striping with distributed parity across all disks, tolerating a single disk failure and rebuilding the lost data from the remaining parity information.
Concept tested: RAID levels and fault tolerance availability
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance
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