An engineer configures the HyperClone feature on a Huawei OceanStor Dorado 3000 storage system.

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.