My iSCSI authorized access list looks like this:
I re-installed esx1 today, and wanted to update the iqn in the group access list above with the new value. When I try to do this, it won't save and returns an error of "Tag 3 is already in use." I then tried to add it as a new entry in group 3, and got the same error. If I add it to a new group, say 5, it adds it without issue; however, if I then try adding another test entry into the same group, I get the same error about the new group. This is an existing configuration that I have used for many years. I tried this both with the new interface and the legacy interface with the same result. It looks like U5 is only allowing one entry per-group, which kind of negates the whole point of having a group. I don't know if this broke in U5 or in some earlier version since I haven't needed to update my groups in a long time. I am still on FreeNAS-11.2-U5; I will try U6 as soon as I can take the downtime. I read the release notes and did not see this listed under the fixes. I noticed there was a recent fix to this section of the code from bug FreeNAS / TrueNASNAS-102158; perhaps this issue was introduced there?
I worked around this issue for now by renaming the IQN in VMWare to match the old IQN I already have in the configuration. Very soon now I will need to add a new member to another group, and that I can't really work around with this. I am hoping I can just create a new group and use the same password; ugly, but should work.