I have several LUNs assigned to individual hosts that I would like to reassign to several hosts on the recommendation of my backup vendor. I created a host group, moved the hosts to that group, and reassigned the LUNs to the group. I can see the storage on all the hosts, but when I start using it, I get errors like the ones below. I've assigned LUNs to hosts many times with no problems, but this is the first time I've tried a group. Is the process different? Is there addition configuration or software needed on the hosts to use the shared LUNs safely? Your help is appreciated as this is affecting my backups right now.
I just learned that this morning. These aren't clustered. They all serve just one application with one server having the write capability and others read-only. I thought that would be the control I need, but it sounds like no. I don't think I can provide the LUNs to the host group with the affect I wanted.