Hello,
I have two 5.1 hosts under VCenter. Old host can see all devices and Datastores. Built new host to replace a failed one. It sees all devices but not all Datastores and the list of Datastores varies from time to time. Seems like a multi-pathing or filtering issue to me but I've been unable to resolve despite a lot of Internet research and testing. Hardware is HP Proliant. SAS HBAs connected to HP SAS disk array. This configuration worked prior to one of the hosts failing and we lost the configuration of that host. Old server HBA is connected to Controller 1 port 1 and Controller 2 port 1. New server HBA connected to Controller 1 port 2 and Controller 2 port 2. Multi-path settings were all Last Active although I have since changed some to Round-Robin. Old host is 5.1.0 , new host is 5.1 Update 2. Licensing is Essentials. The impact is that I cannot migrate VM only from Old host to New host. I have to migrate the VM and allocate new storage for the DS migration as well. Any thoughts would be appreciated.