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To update the VMFS versuion of a VMware DataStore

Posted on 2016-09-28
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Last Modified: 2016-10-02
Hello,

We have just updated to VMware version 6.0 Update 2 and one of the ESXi host datastores is VMFS3 which is no longer supported in VMware 6.0.  Please reference: https://www.experts-exchange.com/questions/28972756/Deprecated-VMFS-Volume-s-found-on-host-Please-consider-upgrading-volumes-s-to-the-latest-version.html

I have never updated a DataStore format before and I do not have a test environment to try different things out.  So I wanted to ask the experts before I do anyuthing and hopefully not screw up the ESXi host in the process.

I have heard that it is an very involved process and then I have read it is not a very involved process.  My questions are below:

1.  May I 'Upgrade to VMFS-5' right from the Vsphere client while the Virtual Machines are still on?
         a.  or will I need to power off any Virtual Servers that reside in that DataStore?

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2.  What are the dangers of changing the VMFS version from 3 to 5 on the datastore?
         a.  Should I move all of the VM's off that DataStore before I upgrade it?
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Question by:Pkafkas
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by:Pkafkas
ID: 41820751
The follwoing article:  https://pubs.vmware.com/vsphere-51/index.jsp#com.vmware.vsphere.storage.doc/GUID-061BE1F4-9EA9-49F4-A537-05EFAFC9BB0E.html

Shows a very easy way to do the upgrade; but, since I have never done this before I wanted to ask.
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by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41820760
1.  May I 'Upgrade to VMFS-5' right from the Vsphere client while the Virtual Machines are still on?
         a.  or will I need to power off any Virtual Servers that reside in that DataStore?

Power them off, and Upgrade.

BUT, I would not recommend an upgrade, because an upgrade ALWAYS keeps the characterisitcs of the original datastore.

2.  What are the dangers of changing the VMFS version from 3 to 5 on the datastore?
         a.  Should I move all of the VM's off that DataStore before I upgrade it?

It fails and corrupts ALL the VMs.

You should always have a backup before you start of all your VMs, and we would recommend, creating the datastore from scratch, e.g. no an upgrade see above.
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by:Pkafkas
ID: 41821047
So I will need to create a new datastore.  How is that done?  If I recall correctly that is done when you first partition the ESXI host.

Wow am I glad that I asked.  I wish I had a test lab to actually try this stuff out on.
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 41821159
Just delete the existing datastore, and then click Add "new" Storage.

*new is missing. but it means new storage. Follow the wizard.

see from Step 4, in my EE Article

Part 2: HOW TO: Connect to the VMware vSphere Hypervisor 5.1 (ESXi 5.1) using the vSphere Client
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