When an engineer delivers a Huawei flash storage system, LUNs cannot be detected on a...

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.