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OceanStor 2200 V3 and 2600 V3 Storage System V300R005 SmartVirtualization Feature Guide 07

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A Local Storage System Encounters a Power Failure and Cannot Detect External LUNs

A Local Storage System Encounters a Power Failure and Cannot Detect External LUNs

Symptom

An HP P6500 storage system is connected to a local storage system. The local storage system loses power and the HP P6500 storage system disks fail as well when read or write I/Os are being transmitted between them. After the local storage system regained power, DeviceManager does not detect the remote LUNs that correspond to external LUNs. Later when the HP P6500 storage system disks recover, DeviceManager still does not detect the remote LUNs.

Possible Causes

After the local storage system is powered on, it establishes a connection to the HP P6500 storage system and uses the established connection to scan for mapped external LUNs. Because the HP P6500 storage system's disks fail, its external LUNs become unavailable. Consequently, the local storage system does not detect external LUNs, and DeviceManager for the local storage system does not the remote LUNs that correspond to the external LUNs.

Procedure

  1. Remove and reinsert all the cables between the local storage system and the heterogeneous storage system.
  2. In DeviceManager, check whether there are remote LUNs that correspond to external LUNs.

    • If yes, no further action is required.
    • If no, keep the fault environment intact and contact technical support engineers.

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Updated: 2018-12-29

Document ID: EDOC1000106155

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