1Z0-902 Exam Dumps | Which statement is true about the disks that are used in ASM diskgroups on the Exadata platform?

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Oracle.1Z0-902.v2024-11-19.q34
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Question 18/34

Which statement is true about the disks that are used in ASM diskgroups on the Exadata platform?

A. In an Exadata storage server, each disk is placed into a separate failure group.

B. The grid disks in ASM diskgroups must have similar performance characteristics in addition lo having the same size.

C. Sparse diskgroups are virtual objects allocated from the DATA diskgroup.

D. If High redundancy is selected, grid disks from the primary and secondary Exadata Database Machine must be specified.

E. Extreme Flash (EF) and High Capacity (HC) disks can be mixed to any capacity within the same diskgroup.

Correct Answer: B

On Exadata systems, ASM disk group configurations require that:
Grid Disks Must Have Similar Performance Characteristics: Within a disk group, grid disks must not only be of the same size but also need to exhibit similar performance traits. This consistency ensures balanced I/O operations and optimizes the performance for ASM mirroring and striping across disks.
Sparse Diskgroups: These are specialized virtual objects that reside within the DATA disk group. Sparse diskgroups are used to support snapshots and other space-efficient storage solutions by creating virtual representations of grid disks within an existing disk group without consuming additional physical space.
These characteristics are fundamental to ensuring that ASM maintains optimal performance and storage efficiency on Exadata platforms.

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