I've been searching around and have not found an answer close enough to resolve my issue. I have just installed vSphere 6.0.
I have 3 ESXi hosts, and have configured them to enable management access (192.168.150.xxx), and a second switch with a vmkernel to attach to a synology NAS (192.168.160.xxx).
I created a storage adaptor on the first host, and attached to the iSCSi Target/LUN no problem, and deployed the vCenter Server. All was good.
I attached the other 2 servers, and created a Data Center, and a Cluster, then attached the 3 hosts - all good...
I then went and attached the other 2 hosts to the same iSCSI Target, and I see the storage with the 3 hosts attached in the Server Center.
Unfortunately, now the vCenter Server keeps disconnecting, and I think it is because the 3 hosts are trampling on each other on the iSCSI storage.
Can anyone point me to when I am doing wrong?
Of course you can share your iSCSI target with multiple hosts.
You need to go to your synology nas, edit the settings of the LUN and make sure you enable the checkbox to allow sessions from multiple iSCSI initiators :