Which of the following is the minimum RAID unit of Huawei RAID 2.0+?

Question

Options

• ADisk
• BBlock (chunk)
• CCache

• A
  10% (4)
• B
  71% (29)
• C
  20% (8)

Explanation

In Huawei RAID 2.0+, the minimum unit of storage management is the block (chunk) - a fixed-size subdivision of a physical disk. This architecture allows RAID 2.0+ to stripe and distribute data at a finer granularity than traditional RAID, enabling better I/O performance, faster reconstruction, and more flexible capacity pooling across disks.

Option A (Disk) is wrong because traditional RAID treats the entire disk as its minimum unit, which is exactly the limitation RAID 2.0+ was designed to overcome - operating at the block level means a single physical disk participates in multiple virtual volumes simultaneously.

Option C (Cache) is wrong because cache is a read/write acceleration layer, not a structural unit of RAID organization; it has no role in defining how data is striped or protected.

Memory tip: Think "2.0+ = finer granularity" - the "+" upgrade over classic RAID is that it breaks disks down into blocks, so the minimum unit drops from disk → block. If you remember that RAID 2.0+ is block-virtualized storage, the answer follows naturally.

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