CompTIA
SG0-001 · Question #309
SG0-001 Question #309: Real Exam Question with Answer & Explanation
The correct answer is B. The added server demand on the disk subsystem will saturate the ports.. Adding five new servers will likely saturate the disk subsystem's active port, as the increased demand approaches its maximum throughput capacity.
Storage Implementation
Question
You have an existing disk subsystem with 16 drives that provides volumes for six Windows hosts on 2Gb/s links. You decide to add another 16 drive tray to double the number of raw hard drives in order to support five (5) new UNIX servers. The average server throughput is 20 MB/s. The disk subsystem is dual ported and configured active-passive. What is likely to occur?
Options
- AThe zone configuration on the fabric will control the traffic flow to the disk subsystem.
- BThe added server demand on the disk subsystem will saturate the ports.
- CThe disk subsystem will notice the extra servers and go active-active to support the load.
- DThe Windows systems will receive precedence as they were registered first on the disk
Explanation
Adding five new servers will likely saturate the disk subsystem's active port, as the increased demand approaches its maximum throughput capacity.
Common mistakes.
- A. Zoning controls access and visibility but does not directly control or prevent port saturation due to excessive I/O demand.
- C. An active-passive disk subsystem will not automatically switch to active-active mode; this requires a different hardware configuration or manual intervention.
- D. Disk subsystems do not inherently prioritize I/O based on the order in which servers were first registered.
Concept tested. SAN performance calculation and port saturation
Topics
#performance prediction#disk subsystem#port saturation#capacity planning
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