Free and Premium Huawei H19-308_V4.0 Dumps Questions Answers

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'sRAID 2.0+ virtualization technologycan 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.

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.

In Huawei’s object storage management (OceanStor Pacific), quotas are a critical administrative tool for resource governance. Option C is correct as quotas serve as a fundamental method for controlling how much of the physical resource pool a specific entity (tenant or user) can access and consume.

Option A and D are correctbecause Huawei supports bothTenant-levelandBucket-levelquotas. Once a Hard Quota limit is reached for a tenant or a specific bucket, the storage system will reject further write requests (PUT operations) to prevent exceeding the allocated budget.Option B is correctbecause the storage management system (DeviceManager or eSight) integrates with the quota system to trigger alarms when usage reaches predefined thresholds (such as 80% or 90%) or when the resource limit is reached, allowing administrators to take proactive measures like expanding the quota or cleaning up data.

Huawei OceanStor BCManager (Business Continuity Manager) is the dedicated software suite designed for managing disaster recovery and backup environments. While other tools perform different functions, BCManager is specifically engineered to orchestrate the entire DR lifecycle:

Management (eReplication):This component manages disaster recovery for various applications (like databases and VMs). It automates the recovery process, performs DR drills without interrupting services, and visualizes the DR topology.

Backup (eBackup):This component handles the backup of virtualized environments.

In contrast,DeviceManager (Option B)is the on-box management tool for single-array configuration.SystemReporter (Option A)is used for performance analysis and reporting.eService (Option D)is a cloud-based proactive monitoring and maintenance platform. Therefore, BCManager is the correct choice for specialized DR management.

Huawei OceanStor Dorado high-end models (such as the 18000 series) utilize the SmartMatrix 4.0 architecture to provide industry-leading resilience. Option A is correct because these models can tolerate the failure of an entire controller enclosure (containing 4 controllers) without interrupting services, as the other enclosure in the cluster continues to handle all I/O. Option B is correct because Dorado features a Symmetric Active-Active design where any LUN is not owned by a specific controller; instead, any controller in the cluster can directly access any LUN, eliminating the performance bottleneck caused by traditional ALUA (Asymmetric Logical Unit Access) and ensuring load balancing.

Option C is correctas Huawei employsSmart Disk Enclosuresequipped with their own CPU and memory. These enclosures can offload tasks like data reconstruction (RAID rebuilds) from the main controllers, significantly speeding up recovery times and reducing the performance impact on host I/O during a disk failure.Option D is incorrectbecause OceanStor Dorado is anAll-Flasharray; it does not support HDDs and therefore does not perform tiering between flash and mechanical media (which is a function of the OceanStor Hybrid Flash series).

According to Huawei’s technical documentation on storage media, Solid State Drives (SSDs) fundamentally differ from Hard Disk Drives (HDDs) in their physical construction and data access methods. HDDs rely on mechanical components, including rotating platters and moving read/write heads. This mechanical nature introduces "rotational latency" and "seek time," which inherently limit the number of Input/Output Operations Per Second (IOPS).

In contrast, Huawei’s OceanStor SSDs utilize flash memory chips (NAND Flash) and a high-performance controller. Because there are no moving parts, the "seek time" is eliminated, allowing for near-instantaneous data access. This results in significantly higher random IOPS and much lower latency (often measured in microseconds rather than milliseconds). Furthermore, Huawei’sFlashLink® technologyfurther optimizes the collaboration between the storage controller and the SSDs, ensuring that even as the drive fills up, the performance remains consistent and the latency remains low. Therefore, in any performance-oriented storage environment, SSDs are the preferred choice over traditional HDDs.

Direct-Attached Storage (DAS) is a traditional storage architecture where storage devices are connected directly to a host server. Huawei documentation defines the following key characteristics:

Direct Connection (Option C):DAS connects to the server via internal or external interfaces such as SATA, SAS, or SCSI, rather than through a storage network.

No Network Devices (Option A):Because it is a 1-to-1 connection, it does not require Fibre Channel switches or Ethernet switches to facilitate the link between the host and the storage. This makes it simple and cost-effective for small-scale deployments.

Block Storage Services (Option B):Like a SAN, DAS provides block-level access. The server’s operating system manages the file system (NTFS, EXT4, etc.) directly on the provided blocks.

While a server attached to DAS can share its files over a network (becoming a file server), the DAS itself is not a "File Storage Service" (Option D). In Huawei’s hierarchy, file services are the domain ofNAS (Network Attached Storage), which provides shared access to files via protocols like CIFS/SMB or NFS.

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 duringdata 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.

To meet the customer's requirement for departmental isolation and resource control, Huawei recommends the combination of Multi-tenancy (Option C) and Quotas (Option D).12

Multi-tenancyis the foundational feature for iso3lation in Huawei object storage. It allows the physical storage system to be logically partitioned into multip4le "Tenants". Each department can be assigned its own tenant environment with its own set of users, access keys, and buckets. Data is logically isolated, meaning one department cannot see or access the data of another unless explicitly permitted.

Quotamanagement is then used to limit the capacity consumed by each department. In Huawei OceanStor Pacific, quotas can be applied at the Tenant level or the Bucket level. By setting a Tenant Quota, the administrator ensures that a specific department does not exceed its allocated budget of storage space, preventing one department from exhausting the resources of the entire system. While Replication (Option A) and WORM (Option B) are valuable for data protection, they do not address the specific needs of departmental isolation and capacity limiting.

Huawei OceanStor Dorado utilizes RAID 2.0+ block virtualization technology, which supports Dynamic RAID Reconstruction. In a traditional RAID environment, if a disk fails, the RAID group continues to operate in a "degraded" mode until the disk is replaced. However, in Dorado's RAID 2.0+, the system uses a distributed spare space policy where spare capacity is spread across all disks in the pool.

When one SSD fails in a storage pool originally configured with RAID 6 (7 data chunks + 2 parity chunks), the system identifies that it no longer has enough physical disks to maintain a 7+2 stripe width. To maintain the same level of protection (dual parity) while utilizing the remaining 8 disks, the system dynamically adjusts the RAID policy for new writes and reconstructed data toRAID 6 (6+2). This ensures that the data remains protected by two parity chunks even with a reduced disk count. This "shrinkage" of the stripe width allows the system to remain in a "healthy" protected state rather than staying in "degraded" mode indefinitely.

Huawei provides tailored solutions for Medical PACS based on the specific performance and scale requirements of healthcare providers. OceanStor Dorado NAS (Option D) is recommended for the "Hot Data" or active tier of a PACS system. Because medical images between 100 KB and 1 MB require high-concurrency access and extremely low latency for immediate clinical review, the FlashLink® technology and all-flash architecture of the Dorado series provide the necessary IOPS to prevent bottlenecks during peak hours.

OceanStor Pacific (Option C)is the primary recommendation for the massive, long-term unstructured data storage required by PACS. A single hospital can generate petabytes of data over several years. OceanStor Pacific’s scale-out architecture allows it to handle billions of small files efficiently using a global namespace, and its high-ratio Erasure Coding (EC) ensures maximum capacity utilization and lower TCO for archives. While Hybrid Flash (Option A) can be used, it is often superseded by the superior performance of Dorado or the superior scalability of Pacific in modern medical environments. FusionCube (Option B) is an HCI solution more suited for edge computing or virtualization rather than specialized, large-scale medical imaging repositories.

Huawei’s new-generation OceanStor hybrid flash storage systems (such as the 5000 and 6000 series) provide high-density snapshot capabilities to ensure data resilience against logical errors or malicious attacks. According to the technical specifications for these systems, the minimum intervals for secure snapshots differ between file and block services.

ForSAN (Block) storage, the system can support high-frequency snapshots with a minimum interval of3 seconds. This low interval allows for near-continuous data protection, enabling recovery points that are extremely close to the moment of a failure or attack. ForNAS (File) storage, the minimum secure snapshot interval is15 seconds. While slightly longer than the SAN interval, this still provides superior granularity for file-level recovery compared to traditional backup schedules that often run only once per day or hour. These "HyperSnap" and "HyperCDP" features ensure that mission-critical applications can be rolled back to a healthy state within seconds, significantly reducing the Recovery Point Objective (RPO) for both structured and unstructured data.

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 superiorscalability 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.

Huawei OceanStor Dorado supports Non-disruptive Upgrade (NDU), which allows the storage system’s software (firmware) to be upgraded while services are running. In a traditional storage environment, an upgrade might require a system reboot or cause a failover that interrupts I/O for several seconds or minutes. However, Dorado's NDU leverages the multi-controller architecture and advanced caching mechanisms.

During an NDU, the system upgrades controllers one by one or in batches. While one controller is being upgraded and rebooted, its workloads are transparently taken over by other active controllers in the same cluster. Because the host-side multipathing software handles the path failover and the storage system maintains cache mirroring, the application servers experience zero downtime and negligible performance impact. This feature is essential for mission-critical environments that require 24/7 availability and cannot afford scheduled maintenance windows for routine software updates.

The SMB (Server Message Block) protocol, which is primarily used for Windows-based file sharing, relies on a centralized authentication and authorization mechanism to manage permissions in an enterprise environment. In Huawei OceanStor NAS documentation, Active Directory (AD) is the primary domain controller system supported for the SMB protocol.

When a Huawei storage system joins an Active Directory domain, it can authenticate users and groups defined in the AD, allowing for seamless integration with Windows environments. WhileLDAP (Option A)andNIS (Option B)are supported by Huawei NAS for theNFSprotocol (typically used in Linux/Unix environments), the SMB protocol is inherently designed to work with the Kerberos and NTLM authentication provided by Microsoft’s Active Directory. This ensures that NTFS-style ACLs (Access Control Lists) can be properly mapped and enforced across the network.

A Storage Area Network (SAN) is a dedicated network for block-level data access. Huawei OceanStor systems support a variety of block-access protocols to ensure compatibility with different infrastructure environments. Fibre Channel (FC) is the industry standard for high-performance enterprise SANs, offering dedicated, low-latency, and lossless delivery. iSCSI provides block-level storage over standard TCP/IP Ethernet networks, making it a flexible and cost-effective alternative for many organizations.

InfiniBand (Option B)is a high-bandwidth, low-latency interconnect protocol often used in High-Performance Computing (HPC) and specialized SAN clusters to connect compute nodes to storage pools at extremely high speeds.NFS (Option D)is excluded from this answer because it is aNAS (Network Attached Storage)protocol. NFS (Network File System) provides file-level access rather than block-level access. While modern Huawei systems like the OceanStor Dorado series are "Unified Storage" (supporting both SAN and NAS on the same hardware), technically, only A, B, and C are considered SAN protocols.

Unlike traditional file storage which uses a hierarchical tree structure, Huawei Object Storage utilizes a flat structure where each "object" is a self-contained unit of data. According to the documentation, an object consists of four fundamental components:

Data (Option D):The actual content of the file (e.g., a photo, video, or document).

System Metadata (Option C):These are fixed attributes managed by the storage system, such as file size, creation date, last modified time, and HTTP content type.

Customized Metadata (Option B):A unique advantage of object storage is the ability to attach user-defined tags or labels to an object (e.g., "Patient_ID: 12345" or "Department: Radiology"). This allows for advanced data indexing and searching without opening the file itself.

Object Identifier (OID) (Option A):This is the unique key or "Address" used to retrieve the object. In a flat namespace, the OID ensures that every piece of data can be located instantly without traversing a complex directory path.

This statement is false because it confuses RTO (Recovery Time Objective) with RPO (Recovery Point Objective). In Huawei’s Disaster Recovery (DR) documentation, these two metrics are defined as follows:

RPO (Recovery Point Objective):Refers to the maximum amount of data loss an organization can tolerate, measured in time. It indicates the "point in time" to which data must be recovered (e.g., "we can only lose 1 hour of data").

RTO (Recovery Time Objective):Refers to the duration of time within which a business process must be restored after a disaster. It measures how long the system can be down before the business is significantly impacted (e.g., "the system must be back online within 4 hours").

The question describes the "point in time" (RPO) but labels it as RTO. In a high-availability solution likeHyperMetro, the RTO and RPO are both theoretically zero, meaning no data loss and no downtime.