ESXi host can't see FC storage devices

Paul Wagner
Paul Wagner used Ask the Experts™
on
Goal: Get Host B to see the same storage devices as Host A

To make things simple, I'll only describe the necessary parts of the infrastructure...

Open-E SAN devices
Dell PowerEdge R430 ESXi hosts
QLogic SANBox 5802 switches
62.5/125 micron cables connecting everything

Host A can see all of the storage devices
 Host A can see three desired devices
Host B (with identical configs as Host A) cannot see two of the three storage devices highlighted above
 Host B can only see one of the three desired devices

Host A and B both have the proper FC assignments in the storage devices
They both have the proper zoning set in the QLogic switches (the switches are licensed for all ports)
I have restarted Host B with no change

NOTE: Host B used to see all the storage devices. I'm not sure why it can't anymore

What else I should be looking for?
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
Can you check if the LUNs are present and shown on the ESXi host ?
Paul WagnerPrincipal Consultant

Author

Commented:
Are you talking about looking in Configuration > Storage Adapters and then clicking on the HBAs?

The LUNs are not there.

Also, if I go to Configuration > Storage and attempt to Add Storage, the missing LUNs are not there.
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
Correct.

If the LUNs are not present, then they are not presented, so WWNN are incorrect, cables are broken.

Do these LUNs have datastores on them ?

Can you check the fabric, for plogi and flogi connections ?
Ensure you’re charging the right price for your IT

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden using our free interactive tool and use it to determine the right price for your IT services. Start calculating Now!

Paul WagnerPrincipal Consultant

Author

Commented:
...also, I spoke to VMware and they said that the problem is not on their end. I might be with the switch or storage vendor. I'm not certain of that and am not sure how to locate the source of the issue in a FC environment.
Paul WagnerPrincipal Consultant

Author

Commented:
Yes, datastores are there. Everything was working before.

I don't see it being a cabling issue.
Host B can see the other LUNs so we know the host cable s are fine.
The missing datastores can be seen by every other host so we know the SAN cables are fine.

Will check WWNN and plogi/flogi now and get back to you
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You should be able to easily identify a connect from the WWNN HBA in the ESXi server to FC Switches, and FC SAN, and vice versa.

when LUNs are present at the ESXi host, but datastores are not present, that's another issue VMware OS related, but if LUNs are not present suggests something external.

I would also check firmware and drivers of HBA are compatible with ESXi Host e.g. on the HCL, and also the SAN is on the HCL.
Mr TorturSystem Engineer

Commented:
Hi,
did you check on your San configuration that the miissing LUN are still presented to Host B ?
What is your San again ? I don't know about open-e san.
Paul WagnerPrincipal Consultant

Author

Commented:
OK guys, looks like something totally different.

I talked to VMware and they said that nothing is coming in from the desired SAN devices so they can't do anything.
I talked to Open-E and they said that they don't see the desired host so they can't do anything.

I talked to QLogic and they didn't see a problem but suggested that I reset the portson the SANBoxes. I first reset the ports to the host and everything started working again.

Looks like the ports to the fabric were caught up somehow. I'm not sure why only some of the SAN devices were invisible while the others were fine, but the port reset did the trick.
Paul WagnerPrincipal Consultant

Author

Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for pterodactylptimeptravel's comment #a41548942

for the following reason:

The offered help by others did not solve the problem. I talked to QLogic Support and they gave me the solution.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
So no flogi and plogi!
Paul WagnerPrincipal Consultant

Author

Commented:
Good point! I forgot you mentioned that. Thanks for the help.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial