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Techyy
Contributor
Contributor

An error occurred while communicating with the remote host

Dear All,

we are using VMware ESXi 6 with 18ESXi servers, While rescan Datastore we are getting below error in few of the ESXi. Some Data stores are visible in some of the ESXi server & some are not. please advice.

" HostDatastoreSystem.QueryAvailableDisksForVmfs" for object "datastoreSystem-50 "

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daggubatinagur1
Contributor
Contributor

Check with the storage end either masking is enabled or not . 

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Techyy
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Contributor

I checke storage side is ok

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anksos
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Enthusiast

Hello,

please give us the export of your zoning configuration from the SAN fabric. This problem is seems to be mostly related with the zoning/mapping from storage to the servers. Also can you give us more information how is connected from the storage to the server end to end. You said 16 servers so i am thinking about blade enclosure. Which vendor, what is the san fabric and what is the storage vendor also.

Thanks

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Techyy
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Contributor

There is no issue in zoning. b/c i verified that...   All Luns from VMAX & VNX & its visible to all hosts except two or three ESXI only.. & while scanning the Datastore getting the error. else working fine.

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anksos
Enthusiast
Enthusiast

Okay, but still please answer in the above questions:

SAN Fabric vendor & model

Server vendor & model

Thanks

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Techyy
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Contributor

SAN Fabric vendor & model :- Brocade DS6520

Server :- HP Blade  Chassis Server.

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anksos
Enthusiast
Enthusiast

Techyy

HPE BL460c g9 ?

Also your datastore is production? if not can you try to unmap the datastores that you cannot see from all the hosts and try to add them again. First in the hosts that are you take the error, to see if the problem is on these specific hosts or in general.

Btw, run again the rescan to HBA adapters and the datastores and upload the hostd.log file.

Thanks

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TEST1981
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Hi all,

Got same issue today when trying to migrate vm`s between datastores.

No other problem on connectivity.

Issue occur on both clusters host

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