SK0-004 · Question #457
An enterprise technician is tasked to implement a disk array that will host continuous disk-to-disk replication. Which of the following storage types should be selected for maximum performance?
The correct answer is D. SAS. SAS (Serial Attached SCSI) is the correct choice for continuous disk-to-disk replication because it is purpose-built for enterprise workloads requiring high throughput and low latency.
Question
An enterprise technician is tasked to implement a disk array that will host continuous disk-to-disk replication. Which of the following storage types should be selected for maximum performance?
Options
- AUSB
- BSCSI
- CSATA
- DSAS
How the community answered
(37 responses)- B3% (1)
- C5% (2)
- D92% (34)
Why each option
SAS (Serial Attached SCSI) is the correct choice for continuous disk-to-disk replication because it is purpose-built for enterprise workloads requiring high throughput and low latency.
USB is a low-bandwidth peripheral interface designed for external consumer devices and cannot deliver the sustained throughput required for enterprise disk-to-disk replication.
Parallel SCSI is a legacy technology with limited cable length, lower throughput than SAS, and lacks modern enterprise scalability for high-performance storage arrays.
SATA is a consumer-oriented interface with half-duplex communication and lower duty cycles, making it unsuitable for the continuous, high-load I/O demands of live replication.
SAS supports full-duplex communication, higher rotational speeds (up to 15,000 RPM), and multiple initiator/target connections, making it ideal for sustained, high-performance I/O workloads like continuous replication. SAS drives also carry a higher MTBF rating and duty cycle than consumer-grade alternatives, which is critical for always-on replication scenarios. These enterprise-class characteristics give SAS a clear performance advantage over SATA, SCSI, and USB in this context.
Concept tested: Enterprise storage interface selection for high-performance I/O
Source: https://www.seagate.com/tech-insights/sas-vs-sata-enterprise-drives-master-ti/
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