When optimizing Huawei flash storage, an engineer will consider the cache prefetch policy.
Which of the following is not a cache prefetch policy type?

FILL BLANK
The_____ feature of the OceanStor Pacific series enables frequently accessed data to be stored in NVMe SSDs, ensuring the response speed to hotspot data access.

FILL BLANK
In Huawei all-flash storage, the _______ feature can automatically store data in different locations based on specified rules for intelligent data management.

In actual service scenarios, the HyperMetro feature of Huawei OceanStor Pacific series supports incremental synchronization. If a site fails, the site that wins arbitration continues providing services, and I/O requests change from the dual-write state to the single-write state. After the faulty site recovers, data generated during the fault can be synchronized to the recovered site.

After purchasing a Huawei OceanStor Dorado series storage system, a customer needs to configure basic storage services in the storage system. Which of the following operations are optional in the basic service configuration? (Choose all that apply.)