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SK0-004 · Question #11

A hardware compatibility list recommends striping with double parity as storage for an application. In a test environment, a technician realizes that a different RAID level can be used to compensate…

The correct answer is C. 5. RAID 6 (striping with double parity) requires a minimum of 4 disks; RAID 5 is the closest equivalent that reduces the minimum disk count to 3 while still providing fault tolerance via single parity.

Server hardware installation and management

Question

A hardware compatibility list recommends striping with double parity as storage for an application. In a test environment, a technician realizes that a different RAID level can be used to compensate for a limited number of available disks. Which of the following is the closest RAID level the technician should deploy while minimizing the number of disks and maintaining fault tolerance?

Options

  • A0
  • B1
  • C5
  • D10

How the community answered

(40 responses)
  • A
    10% (4)
  • B
    5% (2)
  • C
    68% (27)
  • D
    18% (7)

Why each option

RAID 6 (striping with double parity) requires a minimum of 4 disks; RAID 5 is the closest equivalent that reduces the minimum disk count to 3 while still providing fault tolerance via single parity.

A0

RAID 0 provides only striping with no parity or redundancy, offering zero fault tolerance and failing to meet the fault-tolerance requirement.

B1

RAID 1 is pure mirroring and does not use striping or parity, making it a poor architectural match for a replacement of RAID 6.

C5Correct

RAID 5 uses distributed single parity across all member disks, requiring a minimum of 3 disks and tolerating the failure of one disk - making it the closest functional relative to RAID 6 when disk count must be minimized. While RAID 6 tolerates two simultaneous disk failures, RAID 5 preserves the core benefit of fault tolerance and striped performance with one fewer disk. This satisfies the requirement to minimize disks without sacrificing fault tolerance entirely.

D10

RAID 10 combines mirroring and striping but requires a minimum of 4 disks - the same minimum as RAID 6 - so it does not reduce the number of required disks.

Concept tested: RAID level selection - fault tolerance with minimum disks

Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance

Topics

#RAID 5#RAID 6#fault tolerance#parity striping

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