H13-629_V3.0 Exam Questions & Answers

Huawei's LUN-discovery troubleshooting procedure explicitly lists ''Cause 1: The storage pool is faulty'' and ''Cause 2: The link is abnormal.'' For an abnormal link, DeviceManager is used to check whether the connected FC or iSCSI port reports Link down. The separate multipathing troubleshooting section states that multipathing malfunction generally leads to storage performance deterioration or failure to discover multiple paths. Typical causes include the multipathing software being blocked or the HBA driver having its own failover function. Therefore, the complete absence of multipathing software does not inherently prevent a Linux host from detecting a mapped LUN through an available single path. Multipathing primarily provides path aggregation, redundancy, failover, and load balancing.

By contrast, a faulty storage pool can make the LUN unavailable; incorrect FC zoning prevents the host initiator from reaching storage targets; and an actual physical or logical link fault prevents device discovery. Consequently, option A is the false statement.

Study Guide Topics: Storage O&M Basic Storage Service Failure to Discover LUNs FC/iSCSI Link Troubleshooting Multipathing Software.

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.

Huawei explains that a file-system snapshot is a point-in-time copy. When source data changes, ROW writes the new data to another location while the snapshot continues to reference the original data, thereby preserving the source file system's state at snapshot creation time.

The statement is TRUE. Snapshot rollback changes the active file-system data state back to the selected protection point. Active NAS clients must therefore not continue issuing file operations against the source file system while that authoritative state is being replaced. The host share is unmounted before rollback so that active client I/O cannot conflict with restoration of snapshot metadata and data mappings.

The HCIE materials also show the same operational consistency principle in rollback workflows: upper-layer service access is stopped before storage state is reverted. In the Lab Guide's rollback procedure, the first action is to stop upper-layer service access and unmount the relevant file system before storage mappings are changed.

This ensures that the post-rollback file system presents one internally consistent point-in-time image when service access resumes.

Study Guide Topics: Data Storage Technology Presentation HyperSnap File System Snapshot ROW Snapshot Rollback NAS Data Consistency.

Huawei defines To be recovered as the state entered after the fault causing an interruption is rectified when manual recovery is required. The state reminds the administrator that manual synchronization is needed to restore the pair. Therefore, D is correct.

A manually split pair enters Split, meaning replication is suspended; the replication relationship itself is not deleted. An ordinary link or LUN failure causes Interrupted, whereas Invalid is used when the properties of the primary or secondary resource change and the configurations become inconsistent. This makes A and C incorrect.

For file systems, Huawei states that HyperReplication(A) replicates at the file-system object layer and synchronizes all file-system contents and changes to the secondary file system. The WORM section separately documents that file expiration is governed by the WORM regulatory clock.

The retrieved course text documents these two mechanisms separately rather than giving one sentence explicitly naming both WORM fields during replication.

Study Guide Topics: Data Protection Solution HyperReplication(A) for File Systems Pair Status WORM Recovery and Synchronization.

Huawei states that after a remote replication pair is configured, ''the secondary LUN is read-only by default.'' If the primary LUN fails, the administrator can cancel write protection and make the secondary LUN writable so that the secondary storage system takes over host services.

Therefore, the statement is TRUE.

The default read-only behavior protects the DR copy from independent host modifications while normal replication is maintained. In a disaster situation, however, the secondary storage may need to become the active service provider. Removing secondary-LUN write protection enables DR-side hosts to perform both reads and writes against the protected copy.

Huawei specifically identifies this function as useful when a conventional primary/secondary switchover cannot be executed normally after failure of the production array. Once the secondary LUN has accepted new production writes, those changes are tracked so that subsequent incremental synchronization can support recovery and switchback.

This design shortens recovery time while preserving the normal protection model: read-only during ordinary replication, manually writable when DR takeover is required.

Study Guide Topics: Data Protection Solution HyperReplication Secondary LUN Write Protection DR Takeover Failover and Switchback.