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SG0-001 · Question #511

Which of the following RAID levels would allow a technician to take advantage of distributed parity and lose any two drives in a RAID group without losing data?

The correct answer is D. RAID 6. RAID 6 provides distributed parity and can withstand the simultaneous failure of any two drives within the array without data loss.

Storage Functionality

Question

Which of the following RAID levels would allow a technician to take advantage of distributed parity and lose any two drives in a RAID group without losing data?

Options

  • ARAID 0+1
  • BRAID 1+0
  • CRAID 5
  • DRAID 6

How the community answered

(32 responses)
  • B
    9% (3)
  • C
    3% (1)
  • D
    88% (28)

Why each option

RAID 6 provides distributed parity and can withstand the simultaneous failure of any two drives within the array without data loss.

ARAID 0+1

RAID 0+1 (striped mirror) can typically only tolerate the loss of one drive in each striped set before data loss occurs for that stripe.

BRAID 1+0

RAID 1+0 (mirrored stripe) can tolerate the loss of multiple drives as long as they are not within the same mirrored pair, but it only uses mirroring, not distributed parity, and generally does not guarantee two arbitrary drive failures.

CRAID 5

RAID 5 uses single distributed parity and can only tolerate the failure of one drive in the array without data loss.

DRAID 6Correct

RAID 6 implements dual distributed parity, meaning it stores two independent sets of parity information across different drives. This design allows the array to tolerate the failure of any two disks in the RAID group concurrently and still maintain data integrity and availability.

Concept tested: RAID levels and dual drive fault tolerance

Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/understanding-raid

Topics

#RAID#RAID 6#Data redundancy#Distributed parity

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