SG0-001 · Question #399
Which of the following BEST describes the pros and cons of using very large SATA drives in a RAID 6 versus a RAID 5 configuration?
The correct answer is D. PRO:protection against multiple disk failures. RAID 6 offers superior data protection against multiple drive failures compared to RAID 5, especially with large SATA drives where rebuild times are longer.
Question
Which of the following BEST describes the pros and cons of using very large SATA drives in a RAID 6 versus a RAID 5 configuration?
Options
- APRO:better I/O performance
- BPRO:more usable disk space
- CPRO:more usable disk space
- DPRO:protection against multiple disk failures
How the community answered
(21 responses)- A10% (2)
- B5% (1)
- D86% (18)
Why each option
RAID 6 offers superior data protection against multiple drive failures compared to RAID 5, especially with large SATA drives where rebuild times are longer.
RAID 6 typically has worse write I/O performance than RAID 5 due to the necessity of calculating and writing two parity blocks for every write operation.
RAID 6 uses two drives for parity, while RAID 5 uses only one, meaning RAID 6 provides less usable disk space than RAID 5 for the same number of drives.
RAID 6 uses two drives for parity, while RAID 5 uses only one, meaning RAID 6 provides less usable disk space than RAID 5 for the same number of drives.
RAID 6 utilizes two independent parity blocks, enabling it to withstand the simultaneous failure of any two drives in the array without data loss. This enhanced redundancy is crucial when using very large SATA drives, as the increased rebuild time in RAID 5 heightens the risk of a second drive failure before reconstruction is complete.
Concept tested: RAID 5 vs RAID 6 data protection and performance
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels
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