SK0-003 · Question #954
Which of the following RAID levels can sustain the loss of a single disk without data loss?
The correct answer is C. RAID 5 and RAID 3. The question asks which RAID levels offer fault tolerance against a single disk failure. RAID 5 and RAID 3 are both capable of sustaining the loss of one disk without data loss.
Question
Which of the following RAID levels can sustain the loss of a single disk without data loss?
Options
- ARAID 0 and RAID 5
- BRAID 3 and RAID 0
- CRAID 5 and RAID 3
- DRAID 1 and RAID 2
How the community answered
(30 responses)- A3% (1)
- B3% (1)
- C87% (26)
- D7% (2)
Why each option
The question asks which RAID levels offer fault tolerance against a single disk failure. RAID 5 and RAID 3 are both capable of sustaining the loss of one disk without data loss.
RAID 0 (striping) offers no fault tolerance; the failure of any single disk in a RAID 0 array results in complete data loss.
RAID 0 (striping) offers no fault tolerance; the failure of any single disk in a RAID 0 array results in complete data loss.
RAID 5 provides fault tolerance through block-level striping with distributed parity, enabling data reconstruction if a single disk fails. RAID 3 also offers single disk fault tolerance by using striping with a dedicated parity disk, allowing data recovery from a single drive loss.
While RAID 1 (mirroring) can sustain a single disk loss, RAID 2 is an older, uncommon level that uses Hamming codes for error correction and is not typically chosen for its single disk fault tolerance over more modern RAID levels like 3 or 5.
Concept tested: RAID levels and single disk fault tolerance
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-9E86267D-0A7E-4547-A602-C743DA1C85A8.html
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