Host Disconnects Using VMware vSphere 5.5.0 Update 2 and vSphere 6.0

Recently observed one issue during vmfs upgrade from vmfs 3[vSPhere 4.1] to vmfs 5[vSPehere 5.5]
URL for Ref is..
http://www-01.ibm.com/support/docview.wss?uid=ssg1S1005201

Please confirm if this has been fixed in later upgrade or if workaround is the only  solution available right now.

Any dependency  with SAN or its all due to VMware
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patronTechnical consultant Asked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
The solution and fix is here, it's not been fixed, it's a feature which exists in 5.5 U2 and 6.0.

if affected, this is the solution you need to perform.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2113956
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compdigit44Commented:
This is a really interesting post.. I am getting ready to upgrade from vCenter 5.1 to 6.0 update 1 and working using IBM XIV storage and hoping this will not impact me since I have 110+ all of my host are still running 5.0 or 5.1
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patronTechnical consultant Author Commented:
Thanks Andrew,

we are using this command to get this updated manually.

esxcli system settings advanced set -i 0 -o /VMFS3/UseATSForHBOnVMFS5

any way to get this implemented for multiple hosts -or if this command to be used on each host manually ?
Host profile can be used to update this ?

any feature/performance impact if we disable this ATS ?

ATS Disable and VAAI disable both will work here ? as in one case it worked after disabling vaai but not in other ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
script it.

did you check advanced settings using the client ig this variable exists, could then be set in a host profile.

if you have to disable something, its possible there will be an effect.


upgrade all your VMFS3, get rid of them.
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patronTechnical consultant Author Commented:
okay.

Upgrade will work in both case here like if just make it upgraded[existing vmfs3] without downtime ?
or if i have to create new lun with vmfs 5 from scratch.
need to check for advanced setting for any specific value i have to check ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
We would recommend, you create all new VMFS 5.x new datastores on LUNs.

and move all VMs from VMFS3 to VMFS5.

A VMFS3 upgraded datastore has limitations.
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patronTechnical consultant Author Commented:
Thanks
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patronTechnical consultant Author Commented:
Thanks
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