Which storage interface offers the best read/write speeds?
Short answer
B NVMe provides the best read/write speeds by leveraging the high-bandwidth PCIe bus architecture directly.
Question
Key Takeaways
This question tests knowledge of storage hardware performance characteristics, with the common trap being confusion between SAS's enterprise reliability and NVMe's raw speed advantage via PCIe.
NVMe is the correct answer because it utilizes the PCIe bus architecture, providing significantly higher throughput and lower latency compared to SATA, SCSI, or SAS interfaces.
Common mistake: SAS is often chosen incorrectly due to its association with high-performance enterprise servers, but it typically relies on older SAS/SATA protocols that cannot match NVMe's direct PCIe connection speed.
Expert Analysis
Why the Answer Is Correct
NVMe (Non-Volatile Memory Express) is designed specifically for solid-state drives connected via PCIe lanes. By bypassing the legacy AHCI controller overhead and utilizing the parallel nature of PCIe, NVMe achieves vastly superior read/write speeds and IOPS compared to traditional interfaces.
Why the Other Options Are Wrong
SATA is limited by both the interface bandwidth (typically 6 Gbps) and the AHCI protocol overhead, making it much slower than NVMe. SCSI and SAS are robust enterprise-grade interfaces focused on reliability and multi-device connectivity; while SAS can be fast, standard SAS implementations generally do not reach the extreme throughput levels of modern NVMe SSDs connected directly to the CPU via PCIe.
Community Comment Notes
The community consensus strongly favors NVMe. As one user noted, "B — NVMe 🧸 NVMe uses PCIe and is the speed monster among these storage interfaces." This highlights the key differentiator: the underlying bus technology (PCIe vs. SATA/SAS controllers).
Exam Strategy
When comparing storage interfaces, always look at the underlying bus technology. Interfaces using PCIe (like NVMe) will almost always outperform those using older serial buses (like SATA or SAS) in terms of raw sequential and random read/write speeds.
Frequently Asked Questions
Why isn't SAS faster than NVMe?
Is SATA ever faster than NVMe?
Discussion 1 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 1
-
acf9805 👍 1 Answered B465. B — NVMe 🧸 NVMe uses PCIe and is the speed monster among these storage interfaces. 🚀
Reader comments & corrections
No reader corrections yet — spotted an error or have a note? Share it below.
Related Analysis
Practice All 220-1201 Questions
Access 105 questions with complete answers and detailed explanations.
View Full 220-1201 Practice Test →