ACFS Snapshot Requirements for ADVM Compatibility
Examine this command and output: Examine this command: Which statement must be true for the successful execution of the second command? - 
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Community Votes
100% of anonymous learners picked answer A. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The exam tests knowledge of ACFS snapshot constraints, specifically the trap that students might confuse read-only requirements with version compatibility settings.
This question tests the prerequisites for creating ACFS snapshots in Oracle ASM. It establishes that the ADVM compatibility attribute must be set to 12.1 or higher for successful snapshot creation.
Candidates often incorrectly select B (read-only) because traditional backups are read-only, but ACFS snapshots can be created from read/write file systems if compatibility is met.
Community Discussion (3 comments)
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Expert Analysis
Why the Answer Is Correct
The correct answer is A because Oracle documentation explicitly states that creating a snapshot from an existing snapshot is not permitted if any snapshots in the file system were created with an ADVM compatibility level lower than 12.1. This ensures that the underlying volume management features support the snapshot functionality.Why the Other Options Are Wrong
Options B and D discuss the read-only/read-write state of the parent snapshot. ACFS snapshots can be created from both read-only and read/write file systems, so neither is a strict requirement for success. Option C is incorrect because redundancy levels (high, normal, external) do not impact the ability to create snapshots; they only affect data protection.Community Comment Notes
As Test_1 noted, "Creation from an existing snapshot is not permitted if there are: Any snapshots present in the file system that were created with the ADVM compatibility set to less than 12.1." Another user confirmed that "the parent snap can be RW," reinforcing that the compatibility setting is the critical constraint, not the state of the filesystem.Official Reference
Exam Strategy
Focus on specific version numbers and compatibility attributes in Oracle exams. When asked about prerequisites for advanced features like ACFS snapshots, always check for minimum version requirements first before considering state-based conditions.
Frequently Asked Questions
Can ACFS snapshots be created from read/write file systems?
Yes, ACFS snapshots can be created from both read-only and read/write file systems. The key requirement is the ADVM compatibility level.
Why is high redundancy not required for ACFS snapshots?
Redundancy determines data protection levels, not feature availability. Snapshots work across all redundancy types as long as version compatibility is met.