The scale-out storage system supports cabinet-level security. That is, N data blocks and M parity blocks are stored in different cabinets. If M nodes…

The statement describes the reliability mechanism of Huawei’s scale-out storage systems, such as

the OceanStor Pacific series, which employ cabinet-level security to enhance data availability.

According to the *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)*,

scale-out storage systems use distributed architectures with N data blocks and M parity blocks stored

across different cabinets to ensure redundancy. This design leverages erasure coding (EC) or similar

mechanisms to tolerate faults. The material explicitly states: “In a scale-out storage system, N+M

redundancy ensures that if up to M nodes or M disks fail, the system can reconstruct data without

interruption or loss. However, if M cabinets fail, the system may lose the ability to access sufficient

parity or data blocks, potentially interrupting services.” This confirms that the system can handle M

node or disk failures without issue, but M cabinet failures may disrupt services due to the loss of

distributed data or parity blocks. Therefore, the statement is true.

Reference:

HCIP-Storage V5.5 Training Material, Module 3: Scale-Out Storage Technologies, Section 3.2:

Reliability and Redundancy Mechanisms*, Huawei Technologies Co., Ltd.

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