- A
Enable Provisioned Throughput on the EFS file system
Why wrong: Provisioned Throughput ensures consistent throughput but does not change the performance mode; it may not achieve the needed boost without also switching to Max I/O.
- B
Replace EFS with an EBS Multi-Attach volume
Why wrong: EBS Multi-Attach supports limited concurrent writes and has lower aggregate throughput than EFS Max I/O, making it unsuitable for this scenario.
- C
Migrate the file system to Amazon FSx for Lustre
Why wrong: Amazon FSx for Lustre is optimized for high-performance computing workloads, not typically used for SAP shared file systems requiring NFS compatibility.
- D
Change the EFS performance mode from General Purpose to Max I/O
Changing to Max I/O performance mode increases throughput for parallel workloads, directly addressing the performance issue without altering the application.
PAS-C01 EFS Performance Modes Practice Question
This PAS-C01 practice question tests your understanding of operations and maintenance. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: eFS Performance Modes. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An SAP system uses a shared file system mounted via EFS from multiple EC2 instances. The operations team notices that the file system is not performing well during peak loads. What is the most effective way to improve throughput without changing the application?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Change the EFS performance mode from General Purpose to Max I/O
Option D is correct. Changing the EFS performance mode from General Purpose to Max I/O increases throughput for parallel workloads, improving performance without modifying the application. Option A (Provisioned Throughput) provides consistent throughput but does not change performance mode. Option B (EBS Multi-Attach) is not suitable for high-throughput shared file systems due to limited concurrent access and throughput constraints. Option C (FSx for Lustre) is designed for HPC and not typically aligned with SAP shared storage requirements.
Key principle: EFS Performance Modes
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable Provisioned Throughput on the EFS file system
Why it's wrong here
Provisioned Throughput ensures consistent throughput but does not change the performance mode; it may not achieve the needed boost without also switching to Max I/O.
- ✗
Replace EFS with an EBS Multi-Attach volume
Why it's wrong here
EBS Multi-Attach supports limited concurrent writes and has lower aggregate throughput than EFS Max I/O, making it unsuitable for this scenario.
- ✗
Migrate the file system to Amazon FSx for Lustre
Why it's wrong here
Amazon FSx for Lustre is optimized for high-performance computing workloads, not typically used for SAP shared file systems requiring NFS compatibility.
- ✓
Change the EFS performance mode from General Purpose to Max I/O
Why this is correct
Changing to Max I/O performance mode increases throughput for parallel workloads, directly addressing the performance issue without altering the application.
Related concept
EFS Performance Modes
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often confuse throughput modes or believe Provisioned Throughput is the only way to improve performance, but changing from General Purpose to Max I/O can significantly enhance throughput for parallel access patterns.
Trap categories for this question
Scenario analysis trap
EBS Multi-Attach supports limited concurrent writes and has lower aggregate throughput than EFS Max I/O, making it unsuitable for this scenario.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- EFS Performance Modes
- Provisioned Throughput
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
EFS Performance Modes
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review eFS Performance Modes, then practise related PAS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Operations and Maintenance — This question tests Operations and Maintenance — EFS Performance Modes.
What is the correct answer to this question?
The correct answer is: Change the EFS performance mode from General Purpose to Max I/O — Option D is correct. Changing the EFS performance mode from General Purpose to Max I/O increases throughput for parallel workloads, improving performance without modifying the application. Option A (Provisioned Throughput) provides consistent throughput but does not change performance mode. Option B (EBS Multi-Attach) is not suitable for high-throughput shared file systems due to limited concurrent access and throughput constraints. Option C (FSx for Lustre) is designed for HPC and not typically aligned with SAP shared storage requirements.
What should I do if I get this PAS-C01 question wrong?
Review eFS Performance Modes, then practise related PAS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
EFS Performance Modes
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Last reviewed: Jun 20, 2026
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