SK0-004 · Question #294
A stripe set of maximum size is to be configured using two physical disks. One disk has 150GB and the other has 250GB in unallocated space. Which of the following will be the size of the stripe set?
The correct answer is B. 300GB. In a RAID 0 stripe set, usable capacity per disk is limited to the size of the smallest disk, so the total equals that size multiplied by the number of disks.
Question
A stripe set of maximum size is to be configured using two physical disks. One disk has 150GB and the other has 250GB in unallocated space. Which of the following will be the size of the stripe set?
Options
- A150GB
- B300GB
- C400GB
- D500GB
How the community answered
(30 responses)- A7% (2)
- B80% (24)
- C10% (3)
- D3% (1)
Why each option
In a RAID 0 stripe set, usable capacity per disk is limited to the size of the smallest disk, so the total equals that size multiplied by the number of disks.
150 GB represents the capacity of only one disk, not the combined stripe set that uses matching space from both disks.
RAID 0 stripes data evenly across all member disks, requiring equal-sized partitions from each disk. With a 150 GB disk and a 250 GB disk, only 150 GB can be used from the larger disk to match the smaller one. The total stripe set size is therefore 150 GB + 150 GB = 300 GB, with the remaining 100 GB on the larger disk left as unallocated and unusable space in the array.
400 GB is not achievable - it would require 200 GB from each disk, but the smaller disk only has 150 GB available.
500 GB would be the simple sum of both disks (150 + 250), which is incorrect because RAID 0 cannot use the mismatched 100 GB remainder on the larger disk.
Concept tested: RAID 0 stripe set capacity calculation with unequal disks
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-direct-overview
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