1Z0-078 practice question 9 of 15

Examine this command and output: Examine this command: Which statement must be true for the successful execution of the second command?

Full set: 77 questions

Answer options

A: The disk group compatibility attribute for advm must be set to 12. l or higher.

B: The parent snapshot must be read-only. Correct answer

C: The underlying advm volume must be configured with high redundancy.

D: The parent snapshot must be read/write.

Correct Answer:

B. The parent snapshot must be read-only.

Explanation

Oracle ACFS allows a writable snapshot (–w option) to be created only from a read-only parent snapshot. Therefore, before the second command— which uses –w—can succeed, the parent snapshot must be read-only.

Why Incorrect

A. ADVM compatibility 12.1 is needed only for features like tagged snapshots, not basic writable snapshots.
C. Snapshot creation is independent of redundancy level of the volume.
D. Writable parent snapshots cannot be the source for another writable snapshot.

References

1. Oracle® Automatic Storage Management Administrator’s Guide 19c, Sec. 16-5-2 “Creating Read-Write Snapshots” (E96273-11): “Read-write snapshots can be created only from a read-only snapshot.”

2. Oracle® Automatic Storage Management Administrator’s Guide 19c, Table 16-3 ADVM/ACFS Compatibility Requirements – no special compatibility needed for writable snapshots.

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