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Huawei Certification
H19-308_V4.0 Exam
Huawei.H19-308_V4.0.v2026-09-23.q90 Dumps

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Question 21

What protocols does the DAS interface support?

A.iSCSI
B.SAS
C.Fibre Channel
D.InfiniBand

Correct Answer: B,C,D

DAS directly connects storage devices to servers without using a shared storage network. Therefore, DAS commonly uses direct-attached interface technologies such as SAS, Fibre Channel, and InfiniBand, depending on the server and storage hardware design. SAS is widely used for direct disk or enclosure attachment. Fibre Channel can also be used in direct-attached configurations where a server connects directly to storage ports without an FC switching fabric. InfiniBand is a high-speed interconnect that can be used in specialized direct storage environments requiring high bandwidth and low latency. iSCSI is not normally classified as a DAS interface because it encapsulates SCSI commands over TCP/IP and is used for IP SAN connectivity through Ethernet networks. Therefore, the supported DAS interface protocols are SAS, Fibre Channel, and InfiniBand.

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Question 22

Files in the WORM (Write Once, Read Many) state can be read but cannot be modified.

A.TRUE
B.FALSE

Correct Answer: A

Huawei's HyperLock feature provides WORM (Write Once, Read Many) functionality for NAS file systems. When a file is placed in the WORM state, the storage system strictly enforces a policy where the file's data can be accessed and read by authorized users, but any attempt to modify, overwrite, or delete the file is blocked by the storage controller.
In the Huawei OceanStor system, a file enters the WORM state after it is "locked." Once locked, the file remains in a read-only state for a defined retention period. During this time, not even an administrator can modify the file's content or reduce its protection duration. This is critical for meeting regulatory compliance (such as SEC Rule 17a-4) and for protecting sensitive data against ransomware, as it ensures that once data is archived, it remains immutable and verifiable. Only after the retention period has expired can the file be deleted, though it can still never be modified.

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Question 23

Controllers on the new-gen OceanStor hybrid flash storage are interconnected using RDMA.

A.TRUE
B.FALSE

Correct Answer: A

In the new-generation OceanStor hybrid flash storage, controllers are interconnected using RDMA (Remote Direct Memory Access), which allows for high-speed, low-latency data transfers between controllers. This enhances overall performance and responsiveness in the storage system.

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Question 24

SmartMigration supports three data migration approaches: Storage media migration (for example, between SAS and NL-SAS), RAID level migration (between different RAID levels), and conversion between a thin LUN and a thick LUN.

A.TRUE
B.FALSE

Correct Answer: A

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Question 25

Which sizes of cache can be used in the OceanStor 5500 V5? (Multiple Choice)

A.256 GB (dual controllers)
B.64 GB (dual controllers)
C.128 GB (dual controllers)

Correct Answer: A,C

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