VMware 6 iSCSI conncetion to QNAP NAS storage

Just did a full install of 6.0 over 5.5 and now rebuilding network. Have the iSCSI interface configured on both Hosts. The LUN I can't connect to is 23TB, but was connected to before.

Problem 1, in Host1 is it sees the LUNs on the QNAP NAS but one connection is Dead or Error. Host2  connects to both LUNs. Both views are attached. I realize Host1 want connect until I fix Dead or Error problem.

Problem 2, when I go to storage to try to add the 23TB LUN, neither Host sees the LUN as available to add, therefore cannot add.

I shutdown the VMs on Host2 to see if this fix this connection but no change.

Anyone seen this or have ideas?
HaroldNetwork EngineerAsked:
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Paul SolovyovskySenior IT AdvisorCommented:
Are there any LUNs on the same QNAP that you can see or are the other LUNs on different storage?
HaroldNetwork EngineerAuthor Commented:
Yes, I can see the 2TB LUN on both Hosts. Host1 shows Dead, Host2 I see the LUN but can't add it, so it show in storage.

The other LUNs are all production LUNs with VMs on them. The QNAP is our local backup of the production VMs.
Paul SolovyovskySenior IT AdvisorCommented:
can you vmkping the qnap ip address from the ESXi host?

We have seen a bunch of issues with nics after upgrades.  Make sure you're running the correct firmware and drivers on the nics.  The firmware gave us a few issues.  What type of hardware?

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HaroldNetwork EngineerAuthor Commented:
Dell tech gave me an ISO to upgrade both Hosts. I ran it against both hosts after I did the ESX 6 install. Yes I had already tested that too, sorry. I can ping the various IPs assigned to Management, vMotion, SAN VMK......etc
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I've seen 5.5 to 6.0 upgrades, completely trash the networking, including iSCSI IQN name.

Have you checked all is correct ?
Paul SolovyovskySenior IT AdvisorCommented:
the ISO doesn't upgrade the firmware on the nics, check the firmware/drivers/networking, etc..
HaroldNetwork EngineerAuthor Commented:
@paulsolov, I'm not arguing but it did all the firmware on the machine. Though it give you no report at the end and there are 77, which took over an hour to perform. Unless you sat and watched it, I guess some could have been missed.

@Andrew, since I had to add the iSCSI IQNs back, it should have found what is defined at the device, no?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
The iSCSI IQN could be different, to what you had before, check it's the same.

You may need to add the newly generated IQN.
HaroldNetwork EngineerAuthor Commented:
Ok, let me take a look.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Have you checked to see if your QNAP is on the HCL for 6.0 ?
HaroldNetwork EngineerAuthor Commented:
@Andrew, shouldn't these work? (attached)
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
What is the IQN, defined in the iSCSI Software Adaptor ?

Also is the QNAP on the HCL ? You do not specify which model ?

Check the VMware Hardware Compatability Lists HCL here

The VMware Hardware Compatibility List is the detailed lists showing actual vendor devices that are either physically tested or are similar to the devices tested by VMware or VMware partners. Items on the list are tested with VMware products and are known to operate correctly.Devices which are not on the list may function, but will not be supported by VMware.

HaroldNetwork EngineerAuthor Commented:
@Andrew, we're using HW adaptors...attached

QNAP TS-870U-RP....I'm in a world of trouble if this box is incompatible. That or I got to go back to 5.5u2   :-(

I have a feeling I'm going to have to go back to 5.5. What's the difference in these 2?
ESXi 5.5 Update 2 Driver Rollup (Includes VMware Tools)
ESXi 5.5 Update 2d ISO image (Includes VMware Tools)
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You want the filename which has installer in the title...

and also visor.....

this one... ESXi 5.5 Update 2d ISO image (Includes VMware Tools)

rollup is an update!

Interesting Qnap does not have this listed for 6.0, which does not mean anything really, just means they may not have certified it yet, or tested, but the HCL does list it....but it's odd, because they just list vSphere 5.5 as Certifying....

So nothing is really concrete for your iSCSI Qnap. It's not tested or certified for 5.5, let alone 6.0, and only certified for 5.1!
HaroldNetwork EngineerAuthor Commented:
@Andrew, suggestions? We were on 5.5u1. I had not updated to u2. The second Host, which I just updated, was on 5.5 while everything was working and iSCSI had no problems. Since taking Host2 to 6, it all broke. I have a small Lenovo that is dead too.

Hey, I could just take that Host2 back to 5.5u2 and should be good to go right?

Honestly didn't check all this before diving in either. So my mistake. Never have understood how to use VM HCL.
HaroldNetwork EngineerAuthor Commented:
Thanks for your help. We're good now.
Paul SolovyovskySenior IT AdvisorCommented:
what fixed it?
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