SG0-001 · Question #4
Which of the following requires a MINIMUM of three drives and can survive the loss of up to any two drives?
The correct answer is D. RAID 6. RAID 6 requires a minimum of four drives for practical implementation and can survive the loss of up to any two drives simultaneously due to its use of two independent parity blocks.
Question
Which of the following requires a MINIMUM of three drives and can survive the loss of up to any two drives?
Options
- ARAID 1
- BRAID 0+1
- CRAID 5
- DRAID 6
How the community answered
(30 responses)- A7% (2)
- B3% (1)
- D90% (27)
Why each option
RAID 6 requires a minimum of four drives for practical implementation and can survive the loss of up to any two drives simultaneously due to its use of two independent parity blocks.
RAID 1 (mirroring) requires a minimum of two drives and can only survive the loss of a single drive.
RAID 0+1 requires a minimum of four drives and can typically survive the loss of one drive in each mirrored stripe, but cannot necessarily survive the failure of *any* two drives if they are in the same mirrored segment.
RAID 5 requires a minimum of three drives and can only survive the loss of a single drive.
RAID 6 utilizes two independent parity schemes across its disk array, which means it requires a minimum of four drives for practical implementation and can tolerate the simultaneous failure of any two drives without data loss. This level of fault tolerance makes it highly robust for critical data storage.
Concept tested: RAID levels and fault tolerance
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