HP MSA2324i, new volume / LUN added, cannot be seen by ESX 4.1 hosts (old LUN's work fine)

[Fatboy40]

Hi,

I've a vSphere Essentials Plus 4.1 cluster that's connected to 2x HP MSA2324i SAN arrays, we have 2x hosts and both can see current volumes / LUN's absolutely fine (vMotion and offline VM migration all work as expected). I'm starting a project of consolidating the virtual disks / volume on the 2x SAN's, however a new volume I've created on a SAN cannot be seen by either host.

The new volume has been setup exactly as the others, but of course with a unique LUN for the explicit mapping, but when scanning the iSCSI HBA's the new LUN is never found 😞

I was wondering if any others have also had this happen to them and are aware of why this may be occurring ?.

(Also this is at a business I have just joined, this is my third week, and they's had no VMware subscription on their cluster since 2012 otherwise I'd be logging a VMware support call, in the process of getting the sub back up and running)

[martinriley]

Hi there,

So when you go to Add Storage after the rescan does it not show you anything in the 'Select Disk/LUN' window?

Might be worth double-checking that the new LUN has been exported/presented to the hosts correctly, also what LUN ID did you give the new LUN?

vM

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VCAP-DCD / VCAP-DCA / VCP-CLOUD / VCP-DT / VCP5 / VCP4

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vMustard.com

[EmanuelAlamo]

Hi,

Could be something on zoning, but, let's start taking a look on your LUN MASK.

Please, access the host by ssh and post the result of the command:

# esxcli storage core claimrule list

[Fatboy40]

Yep, no new LUN's shown after a rescan 😞

I used an unused LUN number, 301

[Fatboy40]

Using PuTTY to SSH, ran the command as required, no info was returned (just went to a new line).

[martinriley · Accepted solution]

Okay I believe that might be the issue, I ran into this recently- maximum LUN ID is 255, change the LUN ID to a number lower than 255 and try it again, let us know how you get on!

vM

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VCAP-DCD / VCAP-DCA / VCP-CLOUD / VCP-DT / VCP5 / VCP4

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vMustard.com

[EmanuelAlamo]

You would receive a result like this:

[EmanuelAlamo]

Sorry, in version 4.1 the command is:

# esxcli corestorage claimrule list

[Fatboy40]

Bingo, we have a winner !.

I changed the LUN to 149, just playing around at the moment, and it's then shown after a rescan

[martinriley]

Good news, wasted an afternoon on that one myself, it'll stick in the memory now at least