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Which two are the uses of the ASM metadata backup and restore （AMBR） feature？（）
A: It can be used to back up all data on ASM disks.
B: It can be used to recover the damaged ASM disk group along with the data.
C: It can be used to gather information about a preexisting ASM disk group with disk paths，disk name，failure groups，attributes templates，and alias directory structure.
D: It can be used to re-create the ASM disk group with its attributes.

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出自：Oracle认证

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