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Connecting openfiler iSCSI to 3 ESX Hosts with vSphere

Well this is what I have.

I have 1 vsphere 4.0 server controlling all of this.
2 ESX 4.0
1 ESX 3.5
1 Openfiler iscsi with two targets each 450GB.

I have the ESX machines and the openfiler connected to a Flat network on a Gigabit switch.

Then all of the machines are connected to a gigabit switch on the main network with different NICS.

The problem I am having is I can get the iscsi setup on two ESX hosts at once, but when I try to get the 3rd machine to map the LUN it just says there is none available.  I see the two disks under the storage adapter tab, but when I go to the Storage tab and look at the datastores it only shows the local disk.  I do a rescan and when it completes it comes back with only the local datastore.

I have rebooted the Openfiler server and the ESX hosts in question.  However when they come up a different 2 ESX servers will have the iscsi datastore mapped.

I am going batty trying to figure out why only two ESX hosts can have the iscsi attached?  I want to use this for VMotion and have had it working in the past with just two ESX Hosts.

Any help would be appreciated.
1 Solution
I've never tried to connect more than 2 hosts to an openfiler presented storage LUN.

Could it be that OpenFiler has some sort of limitation on number of ISCSI connections to a single target?
kicktechAuthor Commented:
It could be but i am having the hardest time using Openfiler to figure this out.  I was talked in to using Openfiler from a co-worker.  I am a little sad becuase I am more familiar with Freenas.
Should be ok, just ensure you've permitted the ip address of the 3rd server to connect to openfiler
I even have several paths(different NIC) to each LUN
For me, i "allow" the entire subnet id
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heres some tech guides for proper connection of multiple ESX servers to iSCSI hosts. It isnt all that different from NAS to NAS, or from ESXi to ESX so both should illuminate the proper steps, you will need to substitute the Openfiler confi screens for the Dell ones, but thats about all.

Dell MD300i interfacing

VMware iSCSI Interfacing Guide

General iSCSI interfacing Chap 5-7 ESX Server Configuration Guide

Take a look here for a help to another user with same proble

kicktechAuthor Commented:
This is some great stuff, I am still reading over all of it.  But I am learning alot about iscsi.
kicktechAuthor Commented:
Ok I am not sure what is wrong with the whole setup.  But I have followed the suggested documents and taken a few systems off iSCSI.  Thank you for linking those wonderful documents, it was a good read.
kicktechAuthor Commented:
OK so I never got it to work correctly, but I have changed so many settings it is time for me to change the whole thing and do it the VMware way.  Thank you for the links to the documents it was a great help.
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