Free HCSA-Presales-Storage V4.0 Practice Questions

Huawei’s 3DC (Three-Data-Center) solution is designed for high-level business continuity, typically involving a local HA site and a remote DR site. The documentation supports three main topological configurations to meet different reliability and performance needs:

Cascading Network (Option B): Site A (Production) replicates to Site B (Local DR), and Site B then replicates to Site C (Remote DR). This reduces the pressure on the production site (Site A) as it only manages one replication link.

Parallel Network (Option C): Site A replicates directly to both Site B and Site C simultaneously. This provides better protection for the data at Site C, but increases the load and bandwidth requirements on Site

A.  

DR Star Network (Option A): This is a specific variant of the multi-site protection architecture used in Huawei ' s HyperMetro + Remote Replication scenarios. It typically combines an active-active setup between Site A and B with an asynchronous link to Site C, ensuring that even if two sites fail, the third contains a survivable copy of the data.

Huawei’s SmartQuota feature allows administrators to manage storage consumption at the directory, user, or user-group level using three types of thresholds:

Hard Quota (800 GB): This is a strict limit. Once the used capacity reaches this value, the storage system will immediately prevent any further write operations to that directory. Therefore, Option D will occur.

Soft Quota (700 GB): This is a flexible limit combined with a grace period. When the limit is exceeded, the system issues an alarm but continues to allow data writes until the grace period expires or the hard quota is reached. Therefore, Option B will NOT occur.

Advisory Quota (600 GB): This is purely for monitoring and reporting. When reached, the system simply triggers an administrative alarm or notification; it never restricts data writes . Therefore, Option C will NOT occur.

Option A is also correct because the directory is part of a 1 TB file system; it can never exceed the physical size of its parent container. Thus, only B and C are the actions that " will NOT occur. "

OceanStor Dorado uses Huawei RAID 2.0+ and advanced all-flash reliability technologies to improve data protection. Option A is correct because RAID-TP provides triple-parity protection and can tolerate the simultaneous failure of three disks. Option B is also correct because HyperZoom dynamically adjusts RAID member composition after disk failures, helping the system maintain redundancy instead of remaining in a degraded state longer than necessary. Option D is correct because Dorado supports data distribution across disk enclosures, allowing the system to tolerate enclosure-level failures when properly configured. Option C is incorrect because Dorado does not rely on traditional independent hot spare disks. Instead, spare capacity is distributed across the storage pool, enabling faster reconstruction and avoiding the bottlenecks associated with dedicated hot spares. Therefore, A, B, and D are correct.

Huawei’s object storage solution (OceanStor Pacific/OBS) is designed for massive scalability and high availability across geographic boundaries. Option C is correct because the Global Namespace feature abstracts the physical location of data, allowing users to access objects via a single URL/endpoint regardless of which Data Center or Availability Zone (AZ) the data physically resides in. This simplifies application development and data management at scale.

Options A and B are correct as the architecture supports multi-regional deployment. Data can be replicated between regions to ensure disaster recovery and data sovereignty. Unlike traditional SAN/NAS replication which is often limited by latency-sensitive synchronous protocols, object storage utilizes asynchronous transfer mechanisms optimized for the HTTP/S3 protocol. This leads to Option D being correct ; because object storage replication is typically asynchronous and handles high latency well, sites can be separated by thousands of kilometers, making it an ideal solution for global data distribution and remote site backup.

The new-generation OceanStor hybrid flash storage is designed to support modern cloud-native workloads, including those running in containerized environments. To facilitate the connection between storage resources and container orchestrators like Kubernetes, Huawei supports several key plug-ins:

CSI (Container Storage Interface) (Option D): This is the industry-standard interface that allows the storage system to provide persistent volumes (PVs) to containers. By using the Huawei CSI plug-in, users can automate the provisioning, mounting, and management of LUNs (SAN) and File Systems (NAS) directly from Kubernetes manifests.

CDR (Container Disaster Recovery) (Option A): In addition to basic connectivity, Huawei provides the CDR plug-in to manage data protection for containerized applications. CDR enables backup and disaster recovery capabilities for persistent data, ensuring that if a container cluster or a data center fails, the application data can be recovered at a secondary site using replication or backup technologies.

Plug-ins like CSS or ECS (Options B and C) are generally related to other cloud services or specific compute instances and are not the primary container storage plug-ins associated with the OceanStor hybrid flash series.