i too have seen this error, InvalidArgument=Value of '3' is not valid for 'index' in my VC 2.X environment. Seems to be when navigating AWAY from datastores, or selecting an esx server underneath the cluster in the Hosts and Clusters view. Not exactly sure what this is, havent seen any other posts regarding this particular error. Everything else seems to continue to work. Any ideas?
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I'm getting the same error right now and can't figure out what the issue is. You can query the paths via the cli and everything looks fine, not sure why it's broken in VI Client...
have you tried to do a esxcfg-rescan of the hbas?
This sounds like something has gone off.
Can you also look at /vmfs/volumes/ anything strange there?
I have tried rescanning and it didn't change the behaviour. Nothing other than that error is out of the ordinary, the storage works fine. If I take a look at /vmfs/volumes everything looks good and if I look at /vmfs/devices/disks it shows two paths to that volume via the two iSCSI HBAs. I do see the same error on every ESX host that is using that particular iSCSI target, which is a DELL MD3000i.
Chances are then that it might5 be a trivial misconfig on the Md3000i
Here is a document from DEll on how to setup the MD3000i http://www.dell.com/downloads/global/solutions/md3000i_esx_deploy_guide.pdf
To be honest the setup is pretty simple. It starts on page 4.
Not sure you will want to look at it since your servers are working and it seems like a cosmetic error