Huawei OceanProtect utilizes source deduplication to optimize the data protection process. In traditional backup scenarios, the entire dataset is sent over the network to the backup target, which can consume significant bandwidth and time. With source deduplication, the storage system or backup agent identifies redundant data blocks at the source—before they are sent over the network.

By comparing new data chunks against a local cache of already-transmitted fingerprints, the system ensures that only unique, non-duplicate data is physically moved across the production-to-backup link. This significantly reduces network bandwidth consumption and effectively increases the logical backup bandwidth , as the system can process larger volumes of data without being limited by physical network throughput. Consequently, the backup window is shortened , allowing organizations to meet tight RPOs even in environments with limited network resources or massive data growth.

According to Huawei’s BCManager and HyperReplication guides, " incorrect " statements must be identified to understand the distinction between disaster recovery (DR) and active-active solutions. Option B is incorrect because while HyperMetro supports automatic transparent failover (zero RTO) using a Quorum Server, standard synchronous remote replication typically requires manual intervention or third-party management software to trigger a switchover when the primary site fails. In synchronous replication, the secondary LUN is usually in a read-only state and cannot take over automatically without administrative action.

Option D is incorrect because it describes an " Active-Active " state. In a standard Remote Replication pair, only the primary LUN is accessible for host I/O (Read/Write), while the secondary LUN is locked to maintain data consistency. Only the HyperMetro feature allows both LUNs in the pair to provide simultaneous read and write services to application servers across different sites. Regarding distance, while asynchronous replication is physically less constrained, synchronous and HyperMetro technologies are strictly limited by latency (typically requiring round-trip time < 10ms and distance within 100km to 300km depending on the specific product line) to avoid severe application performance degradation.

DAS directly connects storage devices to servers without using a shared storage network. Therefore, DAS commonly uses direct-attached interface technologies such as SAS, Fibre Channel, and InfiniBand, depending on the server and storage hardware design. SAS is widely used for direct disk or enclosure attachment. Fibre Channel can also be used in direct-attached configurations where a server connects directly to storage ports without an FC switching fabric. InfiniBand is a high-speed interconnect that can be used in specialized direct storage environments requiring high bandwidth and low latency. iSCSI is not normally classified as a DAS interface because it encapsulates SCSI commands over TCP/IP and is used for IP SAN connectivity through Ethernet networks. Therefore, the supported DAS interface protocols are SAS, Fibre Channel, and InfiniBand.

This statement is true as it describes a core architectural component of the Huawei SmartMatrix fully-interconnected design. In the new-generation OceanStor hybrid flash systems, multiple controllers within a cluster must communicate at extremely high speeds to synchronize cache data and manage metadata across the entire storage pool.

To achieve the low latency required for these operations, Huawei utilizes RDMA (Remote Direct Memory Access) for controller interconnection. RDMA allows one controller to access the memory of another controller directly, bypassing the operating system ' s kernel and reducing CPU overhead. This high-speed back-end interconnection (often operating at 100 Gbps or higher) ensures that data can be mirrored between controllers almost instantaneously, which is critical for supporting symmetric active-active services and maintaining 99.9999% availability. By using RDMA, Huawei can deliver " flash-like " performance even in hybrid arrays by ensuring that the architectural bottlenecks of traditional controller communication are eliminated.

The statement is true. Huawei 3DC, or three-data-center disaster recovery, is designed to extend existing high availability and disaster recovery architectures. An active-active data center usually provides local high availability and service continuity between two nearby sites, while an active-passive architecture provides remote disaster recovery by replicating data from a production site to a standby site. Huawei’s 3DC solution can combine these models by adding a third site for remote protection, creating architectures such as HyperMetro plus remote replication. This allows organizations to improve resilience without completely redesigning the existing environment. Smooth upgrade capability is important because customers may already have active-active or active-passive deployments and need stronger protection against regional disasters. Therefore, Huawei active-active and active-passive data centers can be upgraded to a 3DC solution.

Huawei OceanStor Pacific is a distributed scale-out storage system optimized for mass unstructured data (File, Object, HDFS). While it provides robust " always-on " service capabilities, Option A is incorrect as it refers to a specific feature of centralized unified storage arrays like the OceanStor Dorado series. OceanStor Dorado is marketed as providing the industry ' s only " Active-active solution for SAN and NAS " within a centralized architecture.

In contrast, OceanStor Pacific ensures service continuity through distributed mechanisms:

Fast Failover (Option B): Technologies such as multi-module concurrent service takeover enable services on a faulty node to be taken over within 10 seconds, minimizing RTO.

HyperGeoMetro (Option C): This feature provides multi-replica cross-site active-active protection for object storage, allowing data to be accessed and modified at multiple sites simultaneously.

HyperGeoEC (Option D): This is a cross-site Erasure Coding (EC) multi-active solution that provides high reliability and space utilization for large-scale deployments.

Because OceanStor Pacific is designed for distributed unstructured workloads rather than integrated SAN/NAS block-and-file convergence in the traditional sense, Option A is the outlier.

This statement is false because RAID 0 and Mirroring (RAID 1) are fundamentally different concepts in Huawei storage technology. As defined in the Huawei technical manual, RAID 0 is " Striping. " It breaks data into chunks and spreads them across multiple disks to increase performance. It has no redundancy.

" Mirroring " is the terminology specifically used for RAID 1. In a RAID 1 configuration, the system writes the exact same data to two separate physical disks simultaneously. This creates a 100% redundant copy (a mirror). If one disk fails, the other continues to provide data, ensuring zero downtime and no data loss. Huawei ' s RAID 2.0+ virtualization technology can implement striping and mirroring across different " chunks " or " extents " within a storage pool, but it maintains the technical distinction: RAID 0 is for performance through striping, while mirroring is for reliability through duplication. Therefore, characterizing RAID 0 as a mirroring technology is a technical inaccuracy.

Enterprise storage systems and general-purpose servers differ mainly in reliability engineering, data protection design, and availability architecture. Production quality control is a key difference because storage systems are built and validated specifically for continuous data services, strict compatibility, and long-term reliability. Power failure protection is also important because storage systems use mechanisms such as cache protection, battery backup, supercapacitors, or data vaulting to prevent data loss during unexpected power failures. High availability architecture is another major difference. Enterprise storage commonly includes redundant controllers, redundant power supplies, redundant paths, hot-swappable components, and failover mechanisms. Price alone is not a technical differentiator because both servers and storage systems vary widely in cost depending on configuration. The real differences are engineering reliability, power-loss protection, and HA architecture.

The new-generation OceanStor hybrid flash storage supports multiple disk storage pool types to meet different performance and capacity requirements. An SSD pool is used when applications require high IOPS and low latency. An HDD pool is used for capacity-oriented workloads where cost per terabyte is more important than flash-level performance. A mixed SSD + NL-SAS HDD pool is also supported for hybrid scenarios, allowing hot data to benefit from flash performance while colder data is stored on high-capacity NL-SAS disks. This aligns with the hybrid flash design goal: balance cost, performance, and capacity through tiered media. By supporting these pool types, OceanStor hybrid flash storage can serve both performance-sensitive and capacity-heavy enterprise workloads. Therefore, all listed options are correct.

Storage Area Network (SAN) storage is designed to provide block-level data access to servers, appearing to the operating system as a locally attached hard drive. Huawei OceanStor SAN solutions (both FC-SAN and IP-SAN) are optimized for high-performance, low-latency applications.

Databases (Option C) , such as Oracle, SQL Server, and DB2, are primary use cases for SAN storage because they require high IOPS and low latency for transactional processing. The block-level access allows the database management system to have granular control over data placement and caching. VMware virtualization (Option B) is another core scenario. SANs provide the shared storage necessary for advanced features like VMotion, High Availability (HA), and Distributed Resource Scheduler (DRS). In these environments, multiple ESXi hosts connect to a centralized SAN to access VMFS (Virtual Machine File System) volumes. While Option A (Big Data) and Option D (File Sharing) often use Distributed Storage (OceanStor Pacific) or NAS, the high-concurrency, structured nature of Databases and Virtualization makes them the definitive scenarios for SAN.