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The mechanism of the HP-UX 11iv2 causes the status of the storage initiator is “unconnected”

Publication Date:  2012-11-05 Views:  62 Downloads:  0
Issue Description
Product and version:
•S5500T V100R001 V100R002
•S5600T V100R001 V100R002
•S6800T V100R001 V100R002
The operating system of the application server: HP-UX hpv2 B.11.23 U ia64 0901983900 unlimited-user license
The HBA card is: HP AB379-60001 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (the system contains the driver program)
The storage and the application take the DAS networking, as the picture 1 displayed:
Picture 1 DAS networking


If there isn’t I/O interaction between the HP-UX 11iv2 and the storage device for a certain period (about 1 minute), see from the storage, the status of the host initiator is “unconnected”, as the picture 2 displayed.
Picture 2 the initiator’s status is “unconnected”
Alarm Information
None
Handling Process
This problem doesn’t impact the actual service, it’s a normal phenomena.
Root Cause
The HP-UX 11iv2 application server can connect the storage device normally, and run the corresponding service, the server will disconnect with the storage automatically once there hasn’t any read-write operation for a certain time; if the application server needs the read-write, it will connect with the storage device again and dispense the read-write command, compared with peer vendor’s storage device, there has the same phenomena.
Thus, we conclude that it’s the HP-UX’s own mechanism causes the status of the storage initiator is “unconnected”.
Suggestions
None

END