Huawei OceanStor storage two controllers’ BBU appear faulty alarm, at this time, which of the following description about the upper business is correct?

Huawei OceanStor storage two controllers’ BBU appear faulty alarm, at this time, which of the following description about the upper business is correct?
A . The system does not work normally
B . If the device at this time accidental power-down, part of the business data will be lost
C . Operational performance is not affected
D . Upper business IO read and write will not have any impact

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Answer: B