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I can only see luns on one port of my QLogic ISCSI HBA.

Posted on 2010-08-23
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Last Modified: 2013-11-14
Hello,

I have a question about a Qlogic Dual port iscsi HBA (QLE406c) setup within Vsphere 4.1 ESX, I hope someone maybe able to correct me where I have gone wrong.

I have trawled guides and help documents but can't seem to find anything that relates to my situation, most help files and setup procedures relate software ISCSI adapters and not Hardware ISCSI Adapters.

I have two hosts machines each with a Qlogic ISCSI HBA adapter in them, each port on both adapters has a fixed IP address within the same subnet. The SAN network is completely isolated from the production network, the SAN Storage device has two controllers also on the same subnet as the network

HOST1 QLOGIC HBA ISCSI port 1 192.168.2.1
HOST1 QLOGIC HBA ISCSI port 2 192.168.2.2
HOST2 QLOGIC HBA ISCSI port 1 192.168.2.3
HOST2 QLOGIC HBA ISCSI port 2 192.168.2.4
ISCSI SAN Storage Port 1 192.168.2.5
ISCSI SAN Storage Port 2 192.168.2.6

The SAN network comprises of two seperate physical network switches.

In switch 1 is HOST1 ISCSI port 1, HOST2 ISCSI port 1 and ISCSI SAN Storage Port 1
In switch 2 is HOST1 ISCSI port 2, HOST2 ISCSI port 2 and ISCSI SAN Storage Port 2

both switches are linked together but not stacked.

The LUNS on the ISCSI Storage device are avalible on both controllers so as to give redundancy.

This setup I believe will allow for the failure of either network switch or either controller on the SAN storage device.

The Issue.

On host1 in vsphere I add the scsi targets (192.168.2.5) and (192.168.2.6) in the dynamic discovery TAB of the Qlogic adapter Port 1. The LUNs created on the ISCSI storage Device are seen.

now for redunancy on host 1, if I try to add the same targets into port 2 of the Qlogic adapter it cannot see the LUNs at all.

I need the LUNs to be discovered on the second port to provide redunancy against a physical failure on any part of the network.

The situation is the same for HOST 2.

I'm not looking to do link aggregation, just multipathing.

I look forward to any helpful suggestions.

Jamie
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Question by:Smognoff
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12 Comments
 
LVL 22

Expert Comment

by:Luciano Patrão
ID: 33506315
Hi

What Storage are you using?

When we have 2 ports(this is the normal) for each HBA, and have 2 HBA adapters on VMware we need to see 4 paths for each LUN

Jail
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Expert Comment

by:bgoering
ID: 33506402
If you really need to keep it all on the same subnet, you may need to add x.x.x.5 on one port, and x.x.x.6 on another. ESX(i) will see the two seperate paths.

I tend to configure storage ports on seperate subnets - and it looks like you are well positioned to do that with the seperate switches and all. If you don't want to do that at least configure a link between the two switches.

Good Luck
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Author Comment

by:Smognoff
ID: 33506470
its an arena ss-6603R

http://www.maxtronic.com/iscsi-raid/ss6603er

3 x 300GB SAS in RAID 5
3 x 1TB SATA in RAID 5

Currently on port 1 on both ESX hosts I see 2 LUNS and 4 paths, but nothing on port 2 even though it's pointing to the same ISCSi target on the same subnet.

Jamie
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Expert Comment

by:Luciano Patrão
ID: 33506544
Hi

Never use this arena before. But iSCSI is the same on any hardware

First did you check your configuration with bgoering example? Or tested by link the 2 Switchs?

This is a production environment? You can make some tests? If so, just to bypass cabling problems, try to change the cables, from port 1 to 2, on both sides, rescan the storage adapters on VMware host

See if check any changes?

Dont forget any changes on iSCSI side or VMware host side you need always rescan the Storage on both discs

Jail
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Expert Comment

by:Luciano Patrão
ID: 33506608
Hi

Sorry i forget to ask, in the Storage side, you present the LUNs for both VMware host right?

Jail
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LVL 22

Expert Comment

by:Luciano Patrão
ID: 33506661
Hi

Since i do not know this iSCSI i downloaded the manuals and have take a look, today i have some time :)

So is what i have checked only in theory and looking at the manual

In the document QIG_SS-6603x_v1.0_20100113_42-30000-5156 in the page 15 in that example and using IP-SAN with Active-Active Redundant environment, what is i think you want to do, i see that both controllers on both servers need to have the same IP addres from both iSCSI controllers(A and B)

And in the document SWUM_Janus-II-Generic-Software_v1.1 in page 127 is how to use multi-path(but this is normal on VMware ESX host that using multi-path Storage9

Did you follow both documents? I think in the first, i not your configuration.

Like i said, this theory because i don't know the product and its configurations

Hope this can help

Jail
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Author Comment

by:Smognoff
ID: 33506697
hello,

This is not a production environment yet so I can make any changes necessary with out effecting any working servers.

once I get everything running smoothly then I will start hosting Guest O/S's for real.

I will try separating the iscsi targets onto different subnets and having one on each port, this is not a situation I have tested with.

I'm not around the servers to test this situation for a couple of days now but when I am i will post my results and findings.

Thank you for your input so far.

Jamie
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Expert Comment

by:bgoering
ID: 33506706
OK, keep us posted :)
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Accepted Solution

by:
Smognoff earned 0 total points
ID: 33526531
Hello Again, just thought i'd update you guys who responded to my question.

After speaking to our SAN storage supplier we have identified some other errors.

To cut a long story short it turns out that this particular model the 6603r which has dual controllers has some issues with VMWare, but also with the Qlogic HBA we are using. The problem appears to be with firmware and although the manufacturers will be bringing out a new firmware they don't know when.

However the single controller model of this SAN storage is compliant and works with VMWare and does work with our HBA's, but this is going end of life so no chance of getting one. We also wanted a dual controller option anyhow.

The Storage is going back to our suppliers and a different dual controller SAN Storage device will be coming soon. :)


Jamie
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Expert Comment

by:bgoering
ID: 33526721
Well its good this is still non-production system. Hate when everyone yells at me for issues like this in prod. Good Luck
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Author Closing Comment

by:Smognoff
ID: 36403571
Accepting that the question could not be answered as product did not suppport dual LAN Controllers in VMWARE.
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Author Comment

by:Smognoff
ID: 36374901
.
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