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[T Series]An HP-UX 11iv2 Inherent Mechanism Defect Led to an Initiator Link Down on the Storage Device

Publication Date:  2012-07-19  |   Views:  662  |   Downloads:  0  |   Author:  q00002810  |   Document ID:  EKB1000008649

Contents
Issue Description Alarm Information Handling Process Root Cause Suggestions

Issue Description

Product and version information:

  • S5500T V100R001 V100R002
  • S5600T V100R001 V100R002
  • S6800T V100R001 V100R002
  • Application server operating system: HP-UX hpv2 B.11.23 U ia64 0901983900 unlimited-user license
  • HBA: HP AB379-60001 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (native driver)

The storage device and the application server were on a DAS network as shown in Figure1.
    Figure 1 DAS network

 

After the I/O activity between the HP-UX 11iv2 application server and the storage device ceased for a period of time (about one minute), the initiator's status became Link Down on the storage device.

Alarm Information

None

Handling Process

This problem does not affect services.

Root Cause

The HP-UX 11iv2 application server and the storage device were properly connected and services were running properly. After the I/O activity ceased for a period of time, the application server proactively disconnected itself from the storage device. When it needed to access the storage device, the application server set up a connection again. The same symptom occurred on peer vendors' storage devices.
It is concluded that an HP-UX inherent mechanism defect led to an initiator Link Down on the storage device.

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