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Q15. What are the performance-optimized technologies of the OceanStor F V5 series? (Multiple Choice)

Optimization of CPU cores

Adaptive cache algorithm

Intelligent I/O scheduling

Q16. Which statements about storage arrays are correct?

A controller is the brain of a storage array and its main components are a processor and cache.1/0 operations and RAID management functions are implemented first With the development of technologies, data management functions such as snapshot, mirroring, and replication are provided.

Intelligent cache prefetch identifies the access mode of a host predicts the data to be accessed, and reads the data from disks in advance to improve the cache hit ratio.

Cache buffers host data in a storage system and improves the performance and reliability of the storage system.

A storage array consists of multiple disks used as a single disk. It stores data in segments an different disks When data is stored, the related disks in the array work together to reduce the time required for storage and improve the space utilization.

Q17. Which of the following are differences between scale-out storage and array storage? (Select all that apply)

Large volume: 10 PB or more data

Performance: IOPS

Performance: TB-level bandwidth

Elastic scalability: thousands of nodes

Huawei distinguishes Scale-out Storage (OceanStor Pacific) from traditional Array Storage (Centralized SAN
/NAS) based on its ability to handle the ” Yottabyte Era ” requirements of mass data.
* Large Volume (Option A): While traditional arrays are limited by the number of controllers and disk enclosures they can address, scale-out storage is designed to aggregate thousands of nodes into a single global namespace, easily managing 10 PB or even EB-level data volumes.
* TB-level Bandwidth (Option C): Distributed storage excels at throughput. By utilizing a high-speed interconnected network (InfiniBand or RoCE) and parallel access protocols like DPC, a scale-out cluster can deliver aggregate bandwidth in the range of TB/s, which is critical for HPC and big data analytics.
* Elastic Scalability (Option D): Traditional arrays typically scale out to a few dozen controllers.
OceanStor Pacific can scale out to 4,096 nodes in a single cluster, providing linear growth in both performance and capacity as nodes are added.
Performance in IOPS (Option B) is not a difference in the sense that both systems provide IOPS; however, centralized all-flash arrays (Dorado) are often superior for low-latency, high-IOPS structured databases, whereas scale-out storage is primarily defined by its massive bandwidth and capacity scalability.

Q18. What are the highlights of the OceanStor V5 in convergence?

A combination of SAN and NAS advantages, ensuring industry-leading functions and performance

HyperMetro for both SAN and NAS scalable to the 3DC version

Data flows between the OceanStor Dorado, F V5, V5, andV3

Non disruptive data migration from third party devices

Q19. Which of the following are the key differences between storage and servers?

Price

Production quality control

Power failure protection

High availability (HA) architecture

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.

Q20. A file system defines the data structure and management for files stored on disks. All NAS storage provides the file system function.

TRUE

FALSE

NAS (Network Attached Storage) provides file-level access to storage, which inherently requires a file system to organize, manage, and structure files on disks. The file system is essential for handling file permissions, directory structures, and data organization, making it a core function of all NAS storage solutions.

Q21. 4-in-1 means that 4 protocols are integrated into 1 OceanStor 100D storage system for unified management.
Which 4 protocols are involved?

Block

HDFS

File

Object

NDMP

Q22. Which of the following descriptions about the models supported by the Dorado V3 are correct?
(Multiple Choice)

The Dorado5000 V3 SAS supports a dual-controller architecture with 256 GB cache.

The Dorado5000 V3 NVMe supports a dual-controller architecture with 512 GB cache.

The Dorado6000 V3 SAS supports a dual-controller architecture with 256 GB cache or 512 GB cache.

The Dorado6000 V3 SAS supports a dual-controller architecture with 512 GB cache or 1 TB cache.

Q23. Which statement about the S3 protocol is incorrect?

Buckets can be nested.

Objects are always stored in buckets.

Objects can be accessed using HTTP.

The S3 is an object access protocol proposed by Amazon.

Q24. Which of the following OceanProtect features greatly improves backup performance and reduces backup time? (Select all that apply)

Source deduplication

Media deduplication and compression

Secure snapshot

Adaptive data locality rearrangement

Huawei OceanProtect incorporates specialized algorithms to achieve industry-leading backup and recovery speeds. Source deduplication (Option A) is a primary performance driver because it filters out redundant data at the source, ensuring that only new data blocks are transmitted, which directly reduces the time required to complete a backup job.
Adaptive data locality rearrangement (Option D) is a unique feature that optimizes how data is written to and read from the physical disks within the OceanProtect array. During the backup process, the system calculates data dispersion in real-time and arranges data blocks on the disks to ensure they are stored sequentially. This is critical because it allows for high-speed sequential reads during data recovery, significantly improving the performance of HDDs which typically struggle with random I/O. While media deduplication (Option B) and secure snapshots (Option C) are essential for storage efficiency and security, they are not the primary features credited with the raw performance “leap” in backup and recovery speed.

Q25. OceanStor Pacific supports multi-protocol interworking that allows a file to be accessed using different protocols at the same time.

TRUE

FALSE

OceanStor Pacific supports multi-protocol interworking, enabling the same file to be accessed simultaneously through different protocols (such as NFS, SMB, HDFS, or S3), which enhances data sharing and flexibility across various applications and services.

Q26. Backup focuses on data recoverability, while archiving focuses on regulatory compliance.

TRUE

FALSE

Backup is primarily concerned with data recoverability in case of loss or corruption, while archiving is focused on long-term data retention to meet regulatory compliance and governance requirements.

Q27. OceanProtect supports the ransomware protection solution, but does not support the Air Gap isolation zone.

TRUE

FALSE

This statement is false because the Air Gap isolation zone is one of the most critical components of the Huawei OceanProtect ransomware protection solution. Huawei provides a comprehensive “four-layer” protection framework for data resilience, where Air Gap technology serves as the final, most secure layer.
The Air Gap feature creates a security isolation zone for backup data. Under normal operations, the replication link between the production backup storage and the isolation zone storage is physically or logically disconnected (the “gap”). The link only opens during a specific, scheduled window to replicate “clean” data from the production site to the isolation zone, and it is immediately closed once replication is finished. This ensures that even if ransomware compromises the main network and production storage, the data in the Air Gap isolation zone remains “invisible” and unreachable to the attacker. Combined with secure snapshots and WORM, this allows organizations to recover their business from an uninfected copy of the data, making Air Gap a core supported feature of the OceanProtect portfolio.

Q28. Space in a NAS storage device may be allocated to multiple departments. Which of the following NAS features can be used to avoid mutual interference, ensure data security, and simplify management?

Security audit

Multi-tenant

WORM

Quota

The correct feature is multi-tenant. In NAS storage, different departments may need to share the same physical storage system while keeping their resources, permissions, and data logically isolated. Multi- tenancy allows one storage system to be divided into independent tenant environments. Each tenant can have separate users, access policies, namespaces, and management boundaries. This avoids mutual interference because one department’s operations are isolated from another department’s services. It also improves data security because departments cannot freely access each other’s data unless permissions are explicitly configured. Management is simplified because administrators can allocate and control resources by tenant. Quota controls capacity usage but does not fully isolate departments.
WORM protects data from modification, and security audit records operations. Therefore, multi- tenant is the best answer.

Q29. In an SCSI-3 model, the server is the target, and the SAN storage is the initiator.

TRUE

FALSE

In the SCSI-3 model, the server (host) acts as the initiator, which sends SCSI commands, and the SAN storage acts as the target, which responds to those commands. The statement reverses these roles, so it is incorrect.

Q30. Which statements about intelligence of OceanStor Dorado are correct? (Choose all that apply.)

A unified storage architecture is used for SAN and NAS. Performance of both SAN and NAS is high.

Data can be migrated among primary storage, object storage, clouds, and hybrid flash storage.

Convergence is supported for all-flash and hybrid flash storage systems, as well as for high-end, mid-range, entry-level, and cross-generation products.

Various SAN and NAS functions are provided on a single device.

OceanStor Dorado offers a unified architecture for SAN and NAS with high performance for both, and supports convergence across all-flash and hybrid flash storage, as well as across different product tiers (high-end, mid-range, entry-level, and cross-generation).
Data can be migrated among primary storage, object storage, clouds, and hybrid flash storage option is not accurate because OceanStor Dorado does not directly support migration between primary storage, object storage, clouds, and hybrid flash storage, as this typically requires additional software or infrastructure.

Q31. iSCSI is implemented based on TCP/IP and has better scalability than Fibre Channel.

TRUE

FALSE

This statement is true according to Huawei’s storage networking fundamentals. iSCSI (Internet Small Computer System Interface) encapsulates SCSI commands into TCP/IP packets for transmission over standard Ethernet networks. Because it leverages the universal TCP/IP stack, iSCSI can operate across existing routers, switches, and long-distance WAN links without requiring the specialized, expensive hardware associated with Fibre Channel (such as FC switches and Host Bus Adapters).
This reliance on standard Ethernet infrastructure provides iSCSI with superior scalability and flexibility. For example, iSCSI allows storage to be accessed over any distance where an IP connection exists, which is inherently simpler than the complex “FCIP” tunneling required to extend FC over long distances. Additionally, as Ethernet speeds continue to evolve rapidly (10GbE to 25GbE, 100GbE, and beyond), iSCSI can easily scale its performance by upgrading standard networking components. While Fibre Channel often offers lower latency and better raw performance in dedicated local environments, the ease of expansion and integration into existing IP networks makes iSCSI the more scalable choice for broad data center environments.

Q32. Which statements are correct about snapshot and clone technologies? (Choose all that apply.)

Compared with snapshots, clones are complete copies of source data, therefore, reading and writing clones do not affect the original data.

Secure snapshots (unmodifiable snapshots) can be used to prevent ransomware.

Snapshots and clones are mainly used in data protection scenarios.

Snapshots can be used for incremental backup.

Clones are indeed full copies of source data, so any operations on the clone do not impact the original data.
Secure or immutable snapshots are effective against ransomware, as they cannot be modified once created.
Both snapshots and clones are commonly used in data protection, providing point-in-time copies and redundancy.
Snapshots can be used for incremental backups by capturing only changes since the last snapshot, thus optimizing storage usage.

Q33. OceanStor 9000 supports ______ editing of media?

20-layer4K

6-layer 4K

10-layer4K

2-layer4K

Q34. What are the front-end protocols of OceanStor Dorado V6?

16G FC

40G Ethernet

32G FC

100G Ethernet

Q35. Which statements are correct about NVMe over Fabrics (NVMe-oF) (RoCE v2)? (Choose all that apply.)

Traditional Ethernet can transmit NVMe-oF (RoCE v2) data packets without packet loss.

NVMe-oF (RoCE v2) significantly improves performance by using the remote direct memory access (RDMA) technology.

Lossless Ethernet can transmit NVMe-oF (RoCE v2) data packets.

The cost of NVMe-oF (RoCE v2) is generally higher than that of NVMe-oF (Fibre Channel).

NVMe-oF (RoCE v2) uses RDMA technology, which allows direct memory access between storage and servers, greatly improving data transfer speed and reducing latency.
NVMe-oF (RoCE v2) requires lossless Ethernet to reliably transmit data packets, as packet loss would impact performance and data integrity.

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Huawei H19-308_V4.0 Exam Syllabus Topics:

Topic	Details
Topic 1	Data Storage Basis: Data storage is the foundation of IT infrastructure, enabling efficient storage, management, and retrieval of digital information. Understanding storage fundamentals is essential for selecting solutions that meet business performance, capacity, and reliability requirements.
Topic 2	OceanStor Dorado: OceanStor Dorado is Huawei’s all-flash storage solution for mission-critical applications demanding ultra-low latency. This platform leverages NVMe technology and intelligent management to accelerate digital transformation.
Topic 3	NAS Storage Basis: Network-Attached Storage delivers file-level storage over standard networks, accessible to multiple users simultaneously. NAS systems offer cost-effective solutions for file sharing, collaboration, and centralized data management.
Topic 4	SAN Storage Basis: Storage Area Networks provide high-speed, block-level storage over dedicated networks for enterprise applications requiring low latency. SAN enables multiple servers to share storage resources while supporting advanced features like snapshots and replication.

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