The storage resources of an enterprise mail application service are limited, so a quota is set for the business user. The soft quota for user A is 500 MB and the hard quota is 800 MB. Under this configuration, which of the following statements are correct? (Multiple choice)

• A.User A can use up to 800 MB of the storage system
• B.When user A uses 500 MB of space, the system will send a resource shortage alarm to the user. When the user adjusts the space to be used below 450 MB, the alarm disappears
• C.User A can use up to 500 MB of storage system
• D.When user A uses 500 MB of space, the system will send a resource shortage alert to the user, and the write fails

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The bandwidth of the two data centers tested by the customer is 155Mbit/s, the peak write bandwidth of an application is 9.8MB/s, the average written bandwidth is 300KB/s, the average write I/O size is 4KB, and the bandwidth utilization rate is 70%. Colleagues choose the primary and standby synchronous remote replication disaster recovery solution

• A.Not feasible. The primary and standby synchronous remote replication disaster recovery solution requires that the bandwidth utilization rate must be >80%.
• B.Not feasible, 200Mbit/s is required to calculate the bandwidth.
• C.Not feasible. The primary and standby synchronous remote replication disaster recovery solution requires that the write I/O size must be less than 2KB.
• D.Feasible, because the conditions meet the requirements of the primary and standby synchronous remote replication disaster recovery program.

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In Huawei OceanStor Backup Solution, the backup data retention period is set to 13 days and the number of retention cycles is set to 2. However, the actual backup is 3 days per cycle.
In this case, how many days will data be retained?

• A.6
• B.13
• C.26
• D.4

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Huawei storage products implement the active/passive data center solution based on HyperMetro. Applications are categorized so that some applications are running in data center A and hot backed up in data center B while other applications are running in data center B and hot backed up in data center A, thereby achieving the active-active effect.

• A.FALSE
• B.TRUE

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The following describes the characteristics of _____ backup networking.

• A.Server-Free
• B.Server-Less
• C.LAN-Free
• D.LAN-Base

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