- A
Add additional EBS volumes and configure RAID 0 across them.
Why wrong: Adding volumes and configuring RAID requires downtime and reconfiguration.
- B
Migrate the EC2 instance to a larger instance type.
Why wrong: Instance migration requires stop/start, causing downtime, and may not directly improve disk I/O.
- C
Modify the EBS volume type and IOPS using Elastic Volumes.
Elastic Volumes allow online modification of volume type and IOPS without downtime.
- D
Create a new EBS volume with higher performance and copy data using rsync.
Why wrong: Copying data requires downtime or at least suspension of writes.
Question 79 of 1,733
Boosting SAP HANA Disk I/O Performance on AWS
This PAS-C01 practice question tests your understanding of operations and maintenance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
A company runs SAP HANA on AWS using a single EC2 instance with EBS volumes. The system experiences performance degradation during peak hours. Which approach would provide the MOST immediate improvement in disk I/O performance without downtime?
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
✓
Modify the EBS volume type and IOPS using Elastic Volumes.
Option C is correct because EBS Elastic Volumes allow modifying the volume type (e.g., to gp3 or io2) and IOPS online without detaching the volume or stopping the instance, providing immediate I/O improvement. Option A is incorrect because adding EBS volumes and configuring RAID 0 requires downtime and reconfiguration. Option B is incorrect because migrating to a larger instance type does not directly improve disk I/O; it improves compute performance. Option D is incorrect because creating a new volume and copying data with rsync involves downtime and does not provide immediate improvement.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add additional EBS volumes and configure RAID 0 across them.
Why it's wrong here
Adding volumes and configuring RAID requires downtime and reconfiguration.
- ✗
Migrate the EC2 instance to a larger instance type.
Why it's wrong here
Instance migration requires stop/start, causing downtime, and may not directly improve disk I/O.
- ✓
Modify the EBS volume type and IOPS using Elastic Volumes.
Why this is correct
Elastic Volumes allow online modification of volume type and IOPS without downtime.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a new EBS volume with higher performance and copy data using rsync.
Why it's wrong here
Copying data requires downtime or at least suspension of writes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Quick reference
RAID Level Comparison
| RAID Level | Min Disks | Fault Tolerance | Read | Write | Usable Capacity |
|---|---|---|---|---|---|
| RAID 0 | 2 | None | Excellent | Excellent | 100% |
| RAID 1 | 2 | 1 disk | Good | Moderate | 50% |
| RAID 5 | 3 | 1 disk | Good | Moderate | 67–94% |
| RAID 6 | 4 | 2 disks | Good | Lower | 50–88% |
| RAID 10 | 4 | 1 disk per mirror | Excellent | Good | 50% |
RAID is not a backup strategy — it protects against disk failure but not against accidental deletion, ransomware, or site-level events.
What to study next
Got this wrong? Here's your next step.
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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Operations and Maintenance — study guide chapter
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Modify the EBS volume type and IOPS using Elastic Volumes. — Option C is correct because EBS Elastic Volumes allow modifying the volume type (e.g., to gp3 or io2) and IOPS online without detaching the volume or stopping the instance, providing immediate I/O improvement. Option A is incorrect because adding EBS volumes and configuring RAID 0 requires downtime and reconfiguration. Option B is incorrect because migrating to a larger instance type does not directly improve disk I/O; it improves compute performance. Option D is incorrect because creating a new volume and copying data with rsync involves downtime and does not provide immediate improvement.
What should I do if I get this PAS-C01 question wrong?
Identify which PAS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on PAS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is running SAP HANA on a memory-optimized EC2 instance with an EBS volume for /hana/data and /hana/log. The database administrator notices that the /hana/log volume is experiencing high write latency. The current volume is a gp2 volume with 1000 GB size. Which change would most effectively reduce write latency?
medium- A.Change the volume type to st1 (throughput optimized) for better write throughput.
- B.Increase the volume size to 2000 GB to get more IOPS.
- C.Enable Multi-Attach on the volume to distribute writes.
- ✓ D.Ensure the EC2 instance is EBS-optimized and use a higher instance type with dedicated EBS bandwidth.
Why D: Option D is correct because using EBS-optimized instances with dedicated EBS bandwidth reduces contention and latency, improving write performance for SAP HANA log. Option A is wrong because changing to st1 is not ideal for log writes; st1 is optimized for throughput, not low latency, and has variable performance. Option B is wrong because increasing volume size increases baseline IOPS for gp2 but does not directly address write latency; latency is influenced more by burst credits and instance EBS bandwidth. Option C is wrong because enabling Multi-Attach does not reduce latency; it allows multiple instances to attach the same volume but can introduce contention.
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Last reviewed: Jun 20, 2026
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