What are the current challenges in disaster recovery? (Multiple choices)

• A.The cloudification trend of IT systems is becoming more and more obvious. Many virtual machines also need to be protected. The current disaster recovery construction lacks a unified management system.
• B.Diverse applications and inconvenient management
• C.Data sharing and other capabilities are limited by the physical location of the data, applications and data cannot be separated, and it is impossible to build agile applications and better disaster tolerance features
• D.Disaster recovery construction requires expensive investment

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The disadvantage of a full backup is that it must rely on the last full backup and the current differential backup to restore the data completely.

• A.True
• B.False

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Which of the following descriptions about the technical characteristics of pre-copy are correct? (Multiple Choice)

• A.Pre-copy needs to suspend RAID group business access in advance.
• B.When the number of errors of the suspicious failed disk exceeds the preset threshold, immediately migrate and copy the data on the suspicious failed disk and import it to the hot spare disk.
• C.Reduce the occurrence of refactoring.
• D.Improve RAID reliability.

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Smartkit can manage third-party devices.

• A.True
• B.False

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Description 1: SATA hard disk can be used in SAS environment
Description 2: In terms of interface standards, SATA is a sub-standard of SAS, so the SAS controller can directly control SATA hard disks, but SAS cannot be used directly in the SATA environment.

• A.Description 1 is correct, description 2 is wrong
• B.Description 1 is wrong, description 2 is correct
• C.Description 1 is correct, description 2 is correct

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