Huawei H13-629_V3.0 Exam Dumps

The correct selections are B, C, and D.

The design objective behind Huawei back-end enclosure connectivity is to distribute back-end traffic and avoid concentrating storage bandwidth, enclosure load, or failure domains on a single connection path. Consequently, disk enclosures should be distributed across multiple loops and controller back-end interface resources.

Huawei's training material describes back-end direct-connect networking using multiple back-end interface modules and requires symmetrical interface-module/port placement. For smart disk enclosures, the uplink and downlink ports are used according to a prescribed cascade topology, and only limited cascading depth is supported. This explains the reasoning behind B, C, and D: distribute enclosures, limit the number connected on each loop, and spread loops across back-end interface modules.

Option A is incorrect because SAS disk enclosures and smart disk enclosures use different back-end connection architectures and must not simply be mixed arbitrarily within one loop.

The exact B, C, D combination is also explicitly provided in the supplied HCIE-Storage question set.

Correct back-end topology planning improves available bandwidth, preserves redundancy, and reduces performance degradation caused by excessive enclosure concentration.

Study Guide Topics: Data Storage Technology Presentation Flash Storage Hardware Disk Enclosures Back-End Networking Loop Distribution.

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.

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.

The correct answer recognizes that the current RPO of 10 minutes actually exceeds (is better than) the 30-minute requirement, so the asynchronous replication interval is already compliant. However, the audit requirement for documented recovery testing represents a gap in validation. The organization needs to execute and document recovery drills to prove that the secondary site can actually meet the recovery objectives in practice—this is a critical requirement in regulated industries and cannot be assumed based on configuration alone.

Why other options are incorrect:

Reducing the replication interval when the current interval already meets requirements is unnecessary over-engineering. Asynchronous replication is acceptable for financial services when RPO requirements are met; many banks use asynchronous replication effectively with proper safeguards. Network latency of 120 ms is normal for asynchronous replication over geographic distances and does not inherently make replication unreliable.

The supplied HCIE-Storage question set identifies A, B, and C as correct.

Link compression is an inter-array transmission optimization associated with HyperReplication. Because it operates on the replication path rather than in the host/application data path, it is transparent to the application server. The host continues to perform ordinary reads and writes against the primary storage system while HyperReplication handles the remote synchronization process.

Huawei describes HyperReplication as the core technology used to synchronize copies of local data to a remote storage system and distinguishes synchronous and asynchronous replication modes. For asynchronous replication, changed data is collected and transferred to the secondary system according to the replication period. Compression can therefore be applied inline to the transmission stream to reduce required WAN bandwidth.

Option D is not part of the keyed link-compression sequence. The retrieved Training Materials establish the HyperReplication transport and consistency mechanisms, but the parsed course text available here does not provide a detailed link-compression processing sequence that independently substantiates the specific ''decompress first, then verify'' assertion. Therefore, that additional sequence should not be inferred.

Study Guide Topics: Data Protection Solution HyperReplication Remote Replication Link Link Compression Bandwidth Optimization.