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Knowledge Base

[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:  528  |   Downloads:  0  |   Author:  q00002810  |   Document ID:  EKB1000008649


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


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.