Storage P2000 and hosts

[waldiwaldiwaldi]

How to check which host is assigned to which server ?

[SUBHAJIT KHANBARMAN_1]

@waldiwaldiwaldi 

From Command line you can execute below commands to check Host details mapped with MSA Volumes,

show volume-maps

show host-maps

From GUI you can check "Explicit Mappings" section.

https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c02520791 (page 71)

Hope this helps!
Regards
Subhajit

I am an HPE employee

If you feel this was helpful please click the KUDOS! thumb below!

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[waldiwaldiwaldi]

Thanks, I know that. I mean more about how to identify what (which of the hosts) is allocated to a specific server?

[SUBHAJIT KHANBARMAN_1]

@waldiwaldiwaldi 

Unable to understand your query from MSA Perspective as you are asking "how to identify what (which of the hosts) is allocated to a specific server?" -> Here Hosts and Server should be same so got confused.

Are you looking to identify which volume present to which server ?

or you wana identify MSA volumes from Host Operating System level ?

Otherwise, below command will show all Host details associsted with this MSA,

show hosts

Hope this helps!
Regards
Subhajit

I am an HPE employee

If you feel this was helpful please click the KUDOS! thumb below!

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[waldiwaldiwaldi]

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@SUBHAJIT KHANBARMAN_1 wrote:

Are you looking to identify which volume present to which server ?

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YES

[SUBHAJIT KHANBARMAN_1]

@waldiwaldiwaldi 

show volume-maps

This command should help you then

Hope this helps!
Regards
Subhajit

I am an HPE employee

If you feel this was helpful please click the KUDOS! thumb below!

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[waldiwaldiwaldi]

I know it. However, I do not know how to tell from this data which server a given host is connected to. For me, host names are sequences of numbers, e.g. 100000008878475b

[SUBHAJIT KHANBARMAN_1]

@waldiwaldiwaldi 

show hosts

Above output should help you to identify "Host ID" which is nothing but Host WWPN or iSCSI node name. If you have any nickname for respective Host WWPN or iSCSI configured then you can see under "Name" column.

But main thing is that you should know which WWPN or iSCI details are from which Hosts. That information only available with you. Otherwise you have to login to the Server and check HBA or NIC information to figure out WWPN or iSCSI and then match it with above command output to identify which host represent that WWPN or iSCSI details.

Hope this helps!
Regards
Subhajit

I am an HPE employee

If you feel this was helpful please click the KUDOS! thumb below!

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[waldiwaldiwaldi]

And that's what I meant.
I ran Get-InitiatorPort in PS and there are host IDs.
But ... everything would be fine if it weren't for another fact ...

Yesterday I added two volumes on one controller and deleted one volume.
After these actions, the hostnames no longer match those on the servers. in one word everything is mixed up.
Strange because all resources are still working properly and are still on the correct servers.

What does he want? I didn't do something?

[SUBHAJIT KHANBARMAN_1]

@waldiwaldiwaldi 

It seems MSA volumes presented to Windows Host. So you can check LUN IDs assigned to respective MSA volumes and check them from WIndows Host Disk Management option provided you have used unique LUN IDs at the MSA end so that you can recognize at the Host end.

Hope this helps!
Regards
Subhajit

I am an HPE employee

If you feel this was helpful please click the KUDOS! thumb below!

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[waldiwaldiwaldi]

I already recognize the volumes and know which server is on. However, the logic of the same host ID in MSA and in the servers was broken as mentioned above.

That is, e.g. I have a YYY server with WWMs ID 15 and the volume in MSA assigned to the YYY server has a different host ID. e.g. ID 27.

What to do with MSA so that the volumes show real ID from WWMs from servers?

Second question. I have two controllers. At the same time, the mess on both controllers, the same volumes have different host IDs.
Maybe one option will sort it all out again?

[ArunKKR]

Hi,

Physical server could have a single or multiple Fibre channel HBA cards with one port or 2 ports.

Each port will have a wwpn

Each wwpn will appear in MSA as an initiator.

You could create a nick name for this initiator so that you can easily identify which host owns this initiator.

You could club multiple initiators and create a host group as well.

Volumes could be identified using the LUN ID that is being used to map volumes.

Windows disk management should provide the LUN ID of the MSA volume.

The issue that you have explained seems to require log analysis from both MSA and host server end.

I would suggest to log a support case for assistance in this regard.