There are 96 disks in a disk domain of Huawei OceanStor hybrid flash storage system. In order to fully utilize the performance of the hard disks, it is recommended that the total number of LUNs in the disk domain should not be less than ___.

• A. 32
• B. 96
• C. 12
• D. 4

When the client server has limited resources but sufficient network bandwidth, which deduplication strategy should be used to back up client data to the physical tape library?

• A. Target-side deduplication (backup software global deduplication)
• B. Target-side deduplication (backup software deduplication)
• C. Source-side deduplication (backup software deduplication)
• D. Target-side deduplication (backup media deduplication)

Regarding the Huawei OceanStor V5 hybrid flash storage system, which of the statement about the cache read and write strategy is wrong? (Multiple Choice)

• A. The resident strategy is suitable for fields that read and write large blocks of data and only read and write once.
• B. When the recycling policy is selected, read data or write data will be eliminated with the lowest priority.
• C. Both read strategies and write strategies include resident, default, and recycling.
• D. The recycling strategy is suitable for business fields with high requirements on performance and a small amount of data.

The engineer went to a customer unit to install Huawei OceanStor 9000 equipment (a total of 5 Huawei OceanStor 9000 C Nodes, both front and rear are 10GE TOE networking, and the TOE network card is installed on site). The equipment has been put on the shelf, and the signal cable and the power cord will be connected next, and software debugging. Due to the tight construction period, the following phenomena occurred during the hardware installation process. Which of the following descriptions of these phenomena are wrong? (Multiple Choice)

• A. There are two ways of inserting the TOE network card into A0, B1 and A0, B3 in the 5 devices. Since they are all inserted in the PCle slot, it will not affect the system deployment or network bandwidth, so it is not necessary to adjust.
• B. There are two stacking copper cables connected to the CE6850 switch. One of the faulty cables needs to be replaced later. Since it does not affect network communication, you can perform basic software commissioning first.
• C. The signal cable labeled "NODEO1A0-0" is inserted into the network port at A0-1, and the signal cable labeled "NODEO1B3-1" is inserted into the network port at B3-0. Because the two network ports of the same network card are paired etc., you can plug the wires in different positions, and you cannot adjust them.
• D. In order to manage each Node separately, all Nodes must connect the NICo port to the management network.

HyperMetro is an active-active solution, which achieves the purpose of active-active in the entire solution through the design of multiple layers of active-active.
Which of the following descriptions about the active-active design of the storage layer of the HyperMetro architecture in data center A and data center B are correct? (Multiple Choice)

• A. The HyperMetro solution provides undifferentiated AA parallel access capabilities for application servers. When any disk array fails, the business automatically and seamlessly switches to the peer storage access, and the business access is not interrupted.
• B. To implement the HyperMetro function, an active-active domain must be created. The active-active domain consists of data center A storage and data center B storage.
• C. The HyperMetro active-active architecture combines two sets of storage controllers into a cross-site cluster system, and the cluster can support a maximum of 32 storage controllers.
• D. HyperMetro adopts a distributed lock mechanism to ensure that services can read and write data center A storage and data center B storage at the same time.