But by looking at the physical layer, it should not be both iSCSI adapters on the hosts go down and the network cards of both hosts have problems. Now I just run the Database server on one host and Application server on the other. I notice that the host with Database server running keeps on saying that the I/O latency increase from the SAN storage. See the attached picture. And I think every time if the host with Database server running loses a connection with the SAN and that makes the system crash.
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