I have two ESXi 5.5 U2 hosts. Both are connected to a Drobo B1200i via a virtual distributed switch. Each host has a direct Ethernet connection from a physical host NIC to a dedicated iSCSI port on the Drobo. Both hosts find the target and populate the LUNs view. I've created a iSCSIDatastore extended across the 4, 4TB LUNS on the Drobo. Both hosts can see and browse and store\retrieve VMs from this shared storage. I can vmkping from host 1 to the target and get a response. If I vmkping from the 2nd host I get nothing, no response. Is this normal behavior? I am also seeing a lot of events that the host lost access to the iSCSIDatastore and then restored it seconds later. I also see latency jump to warning levels when taking any action on a single VM stored on this datastore. We are using jumbo frames set at 9000.
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