H13-629_V3.0 Exam Dumps - Huawei HCIE-Storage Questions and Answers

Huawei defines the DR-drill procedure as: stop the production application and unmap hosts/LUNs → synchronize incremental data → switch the replication relationship → map a LUN → start DR applications → test whether applications start successfully.

Therefore, A, B, and D are the required operations.

Incremental synchronization ensures that the DR copy has the latest protected changes before the service transition. The replication relationship is then switched so the DR-side storage resources can assume the required service role. After the target LUNs are mapped, DR applications are started and tested to confirm that the recovery environment can actually carry the business workload.

Option C is different. A recovery plan must already be defined as part of BCManager DR configuration and orchestration; formulating the recovery plan is not an execution step performed every time a DR drill runs. The course separately describes eReplication configuration as creating protection groups and recovery plans before recovery operations are executed.

A DR drill therefore validates an existing DR design and recovery plan rather than redesigning that plan during each test.

Study Guide Topics: Data Protection Solution → OceanStor BCManager eReplication → DR Management → Recovery Plan → DR Drill → Planned Service Migration.

The flash-storage course describes database applications as having 8 KB I/O, with random reads accounting for 70%, and identifies OLTP as a workload suitable for caching hot, random small-I/O data.

The financial-file material also states that small-file aggregation is applicable to “small check image files in carrier and financial scenarios.” This is inconsistent with option C ' s characterization of document imaging as being dominated by GB-level large-file writes.

Financial OLTP workloads are highly transactional and typically produce small, random I/O with identifiable hot regions, which matches the training material ' s OLTP/SmartCache model. Backup and archiving workflows are throughput-oriented and therefore favor larger sequential transfers, while restoration reverses the dominant direction toward reads. OLAP workloads process substantial datasets and consequently emphasize large sequential read operations.

The directly retrieved training passages do not reproduce the complete four-row financial workload table verbatim, but they specifically support the OLTP pattern and contradict the large-file characterization in option C.

Study Guide Topics: Data Storage Technology Presentation → Typical Application Scenarios → Financial Services → OLTP/OLAP → Document Imaging → I/O Characteristics.

Huawei states: “LUN information exchange refers to the mapping between LUNs and data volumes. That is, when the LUN IDs of the source LUN and target LUN remain unchanged, the data volume IDs of the source data volume and target data volume are exchanged.”

Therefore, A, B, C, and D are all correct.

Before the exchange, the source LUN ID points to its original source data volume, which validates C. During the information exchange, the logical LUN identifiers remain stable but their associated physical data-volume IDs are exchanged, validating D. Consequently, after the exchange, the source LUN ID—the identity already known by the host—now references the target data volume, validating A.

During synchronization before the swap, SmartMigration uses dual-write and DCL technologies to keep the target LUN consistent while host services continue. Once synchronization is complete, space is exchanged and the migration relationship is interrupted/split. At that stage, normal host writes continue against the migrated target data rather than maintaining the previous dual-write synchronization relationship, which validates B.

Study Guide Topics: Data Migration Solution → SmartMigration → Data Synchronization → LUN Information Exchange → Data Volume ID Exchange → Pair Split.

Huawei ' s troubleshooting procedure states: “Cause 2: The link is abnormal.” It then instructs the engineer to check DeviceManager and determine whether the Fibre Channel or iSCSI port connected to the application server has a running status of “Link down.” If it does, the engineer must troubleshoot the corresponding FC or iSCSI link failure. This distinction is important. A Link down status represents a lower-layer connectivity condition involving the physical/interface link, switch path, cabling, peer port, or interface state. IP addressing belongs to the Layer-3 service configuration. An incorrect logical-port IP address or host service IP can prevent IP communication, iSCSI login, or service connectivity, but it does not by itself force an Ethernet physical interface into the Link-down state.

The training material separately treats IP address information as networking configuration information for iSCSI environments, rather than as the definition of a Link-down condition. Therefore, the statement incorrectly attributes the observed physical/link-layer status to IP configuration.

Study Guide Topics: Data Storage Management and O & M → Fault Analysis → Basic Storage Service Troubleshooting → Failure to Discover LUNs → Link Abnormality.

The correct default chunk size for the stated 3.84 TB SSD configuration is 8 KB.

The Training Materials describe RAID 2.0+ global pooling as follows: “The system uses RAID 2.0+ to create a global storage pool… All SSDs evenly contribute LUN spaces for back-end SSD sharing.” This explains why storage space is divided into fine-grained units rather than assigning an entire LUN to a fixed RAID group or individual SSD.

Huawei ' s ROW architecture then organizes these units into chunk groups (CKGs). Instead of traditional overwrite behavior, new data and parity are written into a new chunk group and the LBA mapping is redirected to it.

For 3.84 TB SSDs in the configuration tested here, the corresponding default fine-grained chunk size is 8 KB. Options measured in megabytes represent a much coarser allocation unit and do not match this RAID 2.0+ chunk configuration.

Study Guide Topics: Data Storage Technology Presentation → OceanStor Dorado → RAID 2.0+ → Global Storage Pool → Chunk/CKG → ROW Architecture.

The Lab Guide explicitly requires a pre-configuration check of the service environment and multipathing status before online takeover. It then states: “After eDevLUNs are created, map them to service hosts so that the service hosts can use the target storage.”

The Lab Guide further provides an explicit Configure host path switchover step and later instructs the engineer to switch I/O direction from the source storage to the target storage.

Therefore, checking the environment, mapping the eDevLUNs, and switching host paths are integral parts of the online takeover procedure. Adding route information is optional because it is needed only when the actual network topology requires additional routing to establish management or service connectivity. A directly reachable storage network does not require an additional route.

SmartVirtualization takeover depends fundamentally on storage connectivity, eDevLUN creation/mapping, and multipathing/path migration—not on a universally mandatory Layer-3 route addition.

Study Guide Topics: Data Migration Solution Lab Guide → SmartVirtualization Online Takeover → Pre-Configuration Check → eDevLUN Mapping → Host Path Switchover.

The command required is:

show upgrade package

The storage O & M section distinguishes current-version inspection from upgrade-package and historical-version management. For the current running version, the Training Materials explicitly instruct the administrator to log in to the CLI as a super administrator, run show system general, and check Product Version.

Historical upgrade information is associated with the software upgrade/package subsystem rather than the general system-information query. Therefore, show upgrade package is used to display information about storage-system upgrade packages and the historical software-version information retained by the system.

This distinction is operationally important. show system general tells the engineer what software version is currently active, whereas show upgrade package is used when examining the upgrade history/package information maintained by the controller environment. Huawei ' s O & M course also treats controller upgrades as a controlled lifecycle process involving imported upgrade packages, pre-upgrade inspection, upgrade execution, and result verification.

Study Guide Topics: Data Storage Management and O & M → Storage System Operation Management → Version Information → Controller Software Upgrade → Upgrade Package Management.

The virtual firewall capability in the DCS multi-tenant architecture provides security-policy enforcement inside the virtualized data-center environment. This includes controlling access to tenant/VPC resources, grouping or applying common access policies to cloud servers with equivalent trust and protection requirements, and enforcing permit/deny behavior through mechanisms such as blacklist and whitelist rules. Therefore, A, B, and D correspond to firewall/security-policy functions.

The HCIE Lab Guide establishes that a DCS design must provide intranet/extranet isolation and division of security zones, with security measures applied according to the protection requirements of those zones. The Training Materials also place network and security resources under the virtualized data-center architecture managed by DME/FusionCompute.

Option C belongs to a different security function. The course describes VPN technologies as connectivity mechanisms—for example IPsec VPN, L2TP VPN, GRE VPN, and MPLS VPN—used to establish secure network connectivity between sites or remote networks. It is therefore not the virtual firewall function being tested.

Study Guide Topics: Data Storage Technology Presentation → Datacenter Virtualization Solution → Multi-Tenant Networking → Security Zones → Virtual Firewall → Access Policies.

Huawei states: “I/O-level load balancing in DPC access mode is better than that in NFS access mode (load balancing determination is performed only during mounting).” It further states that DPC supports both POSIX and MPI-IO.

Therefore, B is correct.

DPC is installed on compute nodes and enables one client to connect directly to multiple OceanStor Pacific storage nodes. This removes the single-node access limitation associated with conventional NFS access and allows I/O distribution decisions to be made dynamically at the I/O level instead of only when the file system is mounted.

Option A reverses the protocol characteristics: MPI-IO is associated with DPC, not ordinary NFS access. Option C is incorrect because Huawei specifically identifies the single-storage-node access model of NFS as a potential performance limitation in demanding HPC scenarios. Option D correctly notes that DPC connects to multiple nodes, but its statement that I/Os are cached on one mounted storage node before being forwarded does not describe DPC ' s distributed access architecture.

Study Guide Topics: Data Storage Technology Presentation → OceanStor Pacific → Distributed Parallel Client → DPC vs NFS → I/O-Level Load Balancing → POSIX/MPI-IO.

The HCIE Lab Guide states: “For bond ports of the Bond4 type on the host, the dynamic LACP mode must be configured for the bond ports on the switch.”

Therefore, the correct selection is B. Mode 4.

Mode 4 corresponds to the Bond4/LACP-based link-aggregation design used where multiple physical Ethernet links operate as one logical connection. When front-end switches are deployed as an M-LAG pair, link aggregation can span the two physical switches while presenting a single logical aggregation relationship toward the connected system.

This design is specifically appropriate for switch-port and link redundancy. If one member link or one associated switch-side port fails, the remaining member links continue carrying traffic without requiring the logical storage interface to be taken offline. It also enables bandwidth aggregation under normal conditions.

The Lab Guide ' s networking principles distinguish this from simple standalone interfaces and explicitly require dynamic LACP on the switch side when Bond4 is used. That requirement aligns with an M-LAG front-end design where resilient link aggregation is required across redundant switches.

Study Guide Topics: Data Protection Solution → OceanProtect Network Planning → Front-End Storage Network → Bond4 → Dynamic LACP → M-LAG.