- A
Migrate to a RAID 0+1 configuration with four volumes.
Why wrong: RAID 0+1 adds mirroring, which improves redundancy but does not reduce write latency compared to RAID 0.
- B
Replace gp2 volumes with io1 volumes provisioned with sufficient IOPS for the workload.
io1 volumes provide provisioned IOPS, ensuring consistent low latency for write-intensive workloads.
- C
Increase the volume size of each gp2 volume to 1 TB to increase baseline IOPS.
Why wrong: Increasing gp2 volume size increases baseline IOPS but may not address burst exhaustion; io1 is better for consistent performance.
- D
Move the data to instance store volumes attached to the EC2 instance.
Why wrong: Instance store volumes are ephemeral and data is lost on instance stop/termination, not suitable for persistent database storage.
PAS-C01 Technology Practice Question
This PAS-C01 practice question tests your understanding of technology. 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 is running an SAP HANA database on an EC2 instance with Amazon EBS volumes. The database is experiencing high write latency. The storage is configured as two gp2 volumes in a RAID 0 stripe. Which change is most likely to improve write performance?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
Replace gp2 volumes with io1 volumes provisioned with sufficient IOPS for the workload.
Option B is correct because SAP HANA is an I/O-intensive application that requires predictable, low-latency storage performance. gp2 volumes use a burst-bucket model that can lead to performance degradation under sustained high write loads, whereas io1 volumes allow you to provision a specific number of IOPS independently of volume size, ensuring consistent throughput. By provisioning sufficient IOPS for the workload, you eliminate the write latency caused by gp2's burst credit exhaustion.
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.
- ✗
Migrate to a RAID 0+1 configuration with four volumes.
Why it's wrong here
RAID 0+1 adds mirroring, which improves redundancy but does not reduce write latency compared to RAID 0.
- ✓
Replace gp2 volumes with io1 volumes provisioned with sufficient IOPS for the workload.
Why this is correct
io1 volumes provide provisioned IOPS, ensuring consistent low latency for write-intensive workloads.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Increase the volume size of each gp2 volume to 1 TB to increase baseline IOPS.
Why it's wrong here
Increasing gp2 volume size increases baseline IOPS but may not address burst exhaustion; io1 is better for consistent performance.
- ✗
Move the data to instance store volumes attached to the EC2 instance.
Why it's wrong here
Instance store volumes are ephemeral and data is lost on instance stop/termination, not suitable for persistent database storage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume increasing gp2 volume size (Option C) will linearly improve IOPS, but they overlook that gp2's baseline IOPS scales slowly (3 IOPS per GiB) and that the burst model is insufficient for sustained high-write workloads, making io1 the only option that guarantees consistent, provisioned performance.
Detailed technical explanation
How to think about this question
gp2 volumes provide a baseline of 3 IOPS per GiB and a burst credit pool that allows up to 3,000 IOPS for short periods; once credits are exhausted, performance throttles to the baseline. In contrast, io1 volumes allow you to provision up to 64,000 IOPS per volume (with a ratio of 50 IOPS per GiB), ensuring sustained performance for write-heavy workloads like SAP HANA log writes. Additionally, SAP HANA's persistence layer relies on synchronous writes to the log volume, so any latency spike can directly impact transaction commit times and overall database responsiveness.
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.
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
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
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.
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.
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FAQ
Questions learners often ask
What does this PAS-C01 question test?
Technology — This question tests Technology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Replace gp2 volumes with io1 volumes provisioned with sufficient IOPS for the workload. — Option B is correct because SAP HANA is an I/O-intensive application that requires predictable, low-latency storage performance. gp2 volumes use a burst-bucket model that can lead to performance degradation under sustained high write loads, whereas io1 volumes allow you to provision a specific number of IOPS independently of volume size, ensuring consistent throughput. By provisioning sufficient IOPS for the workload, you eliminate the write latency caused by gp2's burst credit exhaustion.
What should I do if I get this PAS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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