Adding Controllers to Huawei OceanStor Systems
Short answer
B Adding additional controllers to an HUAWEI OceanStor system requires a 56 Gb Infiniband module for high-speed internal controller communication.
Question
Key Takeaways
This question tests knowledge of Huawei's internal storage network architecture, specifically distinguishing between host-facing protocols (FC/iSCSI) and the high-speed internal interconnect (InfiniBand) used for controller communication.
To add controllers to an HUAWEI OceanStor system, you must use a 56 Gb Infiniband module. This ensures the high-speed internal communication necessary for controller clustering.
Common mistake: Candidates often choose SAS cabling because it is a common storage protocol, but SAS is used for drive connections, not the high-bandwidth internal cluster fabric required for adding controllers in OceanStor systems.
Expert Analysis
High-Speed Interconnect Requirement
The Huawei OceanStor storage architecture relies on a high-speed, low-latency internal communication fabric to maintain data consistency and performance across controllers. When expanding the system by adding additional controllers, the critical requirement is a dedicated interconnect that supports the massive bandwidth needed for cache coherency and metadata synchronization.
Why InfiniBand is Correct
Option B (56 Gb Infiniband module) is the correct answer because Huawei OceanStor systems utilize InfiniBand technology as their primary internal controller interconnect. The 56 Gb speed ensures that the added controller can communicate with existing controllers fast enough to prevent bottlenecks during read/write operations. This high-speed link is essential for the "Intelligent Data Storage System" functionality where multiple controllers act as a single logical unit.
Analysis of Distractors
The most attractive but wrong approach is selecting Option A (SAS cabling). SAS (Serial Attached SCSI) is commonly used for connecting drives to controllers or for lower-level storage expansion, but it lacks the bandwidth and latency characteristics required for the high-speed controller-to-controller communication in modern enterprise arrays like OceanStor. While SAS is fundamental to storage connectivity, it is not the protocol used for the internal cluster fabric when adding controllers. Similarly, Options C (Smart I/O card) and D (FC or iSCSI Host Bus Adapter) refer to host-facing interfaces or general I/O expansion, not the specific high-speed internal interconnect module required for controller clustering.
Community comments correctly highlight that controllers must communicate at high speeds, pointing toward InfiniBand. However, some may mistakenly believe standard networking or SAS is sufficient, ignoring the proprietary high-performance nature of Huawei's internal fabric.
Exam Strategy
When studying storage expansion questions, always distinguish between the protocols used for host connectivity (like FC or iSCSI) and those used for internal array management or controller clustering. For Huawei OceanStor specifically, memorize that InfiniBand is the key technology for internal high-speed controller communication, while SAS is typically associated with disk enclosure connections.
Frequently Asked Questions
Why can't I use SAS cables to connect new controllers?
What is the role of the 56 Gb Infiniband module?
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
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
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10c5cfe 👍 1 Answered Bcontroller should communicate at high speeds with infiniband.
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