In the last section, you learned about the iSCSI storage architecture. Now you will learn how to troubleshoot the problems in iSCSI storage. In a vSphere environment, the iSCSI storage problem that is most associated with the network configuration settings is that the storage can't connect or the performance does not keep up. In the following example, we're going to look at it!
The ESXi host can't access the iSCSI storage, so what is the problem?
First, check whether the ESXi host can see the LUN via this command:
Esxcli storage core path list
Then check whether rescanning for storage has restored the visibility of the LUN using the GUI.
Next, check whether the ESXi host access IP was stored in the past, and whether you have changed the host configuration recently.
You can use a bottom-up approach to troubleshoot, as described here.
Check for the iSCSI storage VMkernel interface configuration errors.
In the ESXi host, use this command:
ping 10.20...