Lost connection of 10GB iscsi port for storeserv 8200

[shang1983]

I've setup a storeserv 8200 with 4 10GB iscsi port connections last week. The switch is configured with access port for all the port in the storage. All my ESXi host able to detect the 4 target.

Recently i discover that all my ESXi host only detects 2 target, and i test ping from esxi host to both failed port and the result are request time out. I tried to ping from both failed port to the esxi host having the same request timed out result.

I have tried to change the fibre cable and checked the switch configuration for any changes made after the deployment.

Any diagnostic method to detect the cause of the connection failure?    

[Dennis Handly]

Does "showhost" detect it can't see the hosts anymore?

[shang1983]

Still can detect the host. Is just that 3PAR has 4 iscsi port connected but only detects 2. I configured it last week and all the host able to ping and connected to the 4 iscsi port. The dynamic discovery also able to discover all 4 path connection.

Just this week, the hosts connected to 2 ports only. I ping test and found there's 2 ports not able to ping the IP. As i don't have extra transceiver, I tried changed fibre cable, change the transceiver to another switch port and switch transceiver with another device.

[Dennis Handly]

>Still can detect the host. Is just that 3PAR has 4 iSCSI port connected but only detects 2. 

That's what I meant, detect the host on all 4 ports.

Any particular pattern to which ports are still good and which are bad?