This statement is true. Huawei's HyperClone documentation states that reverse synchronization is supported only when the secondary LUN capacity is greater than or equal to the primary LUN capacity. In this question, the secondary LUN is 20 GB and the primary LUN is 10 GB, so the capacity condition for reverse synchronization is met.
Huawei also states that during reverse synchronization, the capacity of the primary LUN cannot be expanded. This directly matches the second part of the statement.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* details management tools:
- Option A: False. "SmartKit is used for hardware inspection, OS installation, and firmware upgrades, but it does not provide alarm reporting, file upload, or remote access capabilities."
- Option B: True. "DeviceManager supports resource allocation, user management, data protection, performance monitoring, and alarm management."
- Option C: True. "DME IQ provides cloud-based management, remote maintenance, and predictive analytics."
- Option D: True. "The CLI supports all listed functions, including resource allocation and alarm management." Thus, option A is false.
Reference:
HCIP-Storage V5.5 Training Material, Module 5: Storage System Maintenance and Troubleshooting, Section 5.16: Management Tools and Functions*, Huawei Technologies Co., Ltd.
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Throughput
Explanation:
Storage performance metrics are covered in the *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)*: "For large I/O sizes (≥64 KB), throughput is the primary performance indicator, as it measures the data transfer rate, critical for applications like video streaming or large file transfers." Throughput, measured in MB/s or GB/s, reflects the system's ability to handle large data volumes, making it the key concern for such scenarios.
Reference:
HCIP-Storage V5.5 Training Material, Module 5: Storage System Maintenance and Troubleshooting, Section 5.8: Performance Metrics and Optimization*, Huawei Technologies Co., Ltd.
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