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In which situations will the ASM metadata backup help you recover the ASM disk in a disk group？（）
A: when one or more file directory paths are accidentally deleted from an ASM disk group
B: when one of the disks in a disk group is accidentaly unplugged
C: when the data file on an ASM disk group gets corrupted
D: when one or more disks in an ASM disk group are lost

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出自：Oracle认证

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