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SG0-001 · Question #27

How many disks are required to create RAID 3 utilizing five data drives with a hot spare?

The correct answer is C. 7. To create a RAID 3 array with five data drives and a hot spare, a total of seven disks are required. RAID 3 requires one dedicated parity drive in addition to the data drives and the hot spare.

Storage Implementation

Question

How many disks are required to create RAID 3 utilizing five data drives with a hot spare?

Options

  • A5
  • B6
  • C7
  • D10

How the community answered

(61 responses)
  • A
    2% (1)
  • B
    3% (2)
  • C
    89% (54)
  • D
    7% (4)

Why each option

To create a RAID 3 array with five data drives and a hot spare, a total of seven disks are required. RAID 3 requires one dedicated parity drive in addition to the data drives and the hot spare.

A5

5 disks would only accommodate the data drives, leaving no room for parity or a hot spare in a RAID 3 configuration.

B6

6 disks would allow for five data drives and one parity drive, but would not include a hot spare.

C7Correct

RAID 3 requires one dedicated parity drive for fault tolerance, meaning 5 data drives + 1 parity drive = 6 drives for the array. Adding one hot spare to this configuration brings the total number of disks required to 6 + 1 = 7 disks.

D10

10 disks is significantly more than needed for five data drives, one parity drive, and one hot spare.

Concept tested: RAID 3 disk requirements (data, parity, hot spare)

Source: https://www.ibm.com/docs/en/aix/7.2?topic=concepts-raid-levels

Topics

#RAID 3#hot spare#disk configuration

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