![]() To provide additional power to storage controller to speed up the I/O. To maintain the power for clock synchronization. Answer: A 3.What is the main purpose of backup battery units (BBU) in storage controllers? A. Backup jobs must be separately maintained, complicating management and maintenance. Backup data is based on LANs, affecting network performance. The backup agent affects the performance of application servers. ![]() Instruction flows are transmitted over the LAN whereas data flows are not. Answer: B 2.Which of the following statements about LAN-based backup is incorrect? A. When the power input is normal, BBUs are in the standby state. If BBUs become faulty, the service system will be interrupted. When the external power supply fails, BBUs can supply power to enable data synchronization from the cache to disks in disk enclosures. When the external power supply fails, BBU modules provide backup power for all disks. Which of the following statements about controller enclosures is correct? A. 1.Huawei V3 series storage system hardware includes controller enclosures and disk enclosures.
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