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Esx server 5.5 and VMFS-5 size support

Posted on 2014-11-06
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Guys i need some help here. I'm a little confused.

we are using a storage array with 50 TB on it. We have VSphere 5.5 installed and running with VMFS-3. We assigned space like this. VSphere is connected to storage array via ISCSI

2 TB is carved from our storage array and present to Vsphere 5.5 as a LUN. The LUN is added and then formatted for VMFS-3. This then becomes the datastore for our Vm/vmdk files.

Based on our step above if we went to VMFS-5 can we present a disk bigger than 2 TB to Vpshere? Is the limit for each VMDK still 2TB?

Also can you point me to the documentation for this if it is possible. I spoke with a consultant and they said it's still a 2 TB limit even with VMFS-5
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Question by:iamuser
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 40427284
Why are you using LUNs formatted to VMFS-3 ?

This is just offered in 5.5, for backwards compatibility for 4.x!

If you only have 5.x, create all LUNs with VMFS-5.

Limit of VMDKs in 5.5 is 62TB for the VMDK.  (this is a new feature of 5.5, 5.1/5.0 are different), it's nothing todo with VMFS-5.

see here
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2058287

also my EE Article

HOW TO: What's New in VMware vSphere Hypervisor 5.5 (ESXi 5.5)

Configuration Maximums PDF for 5.5

http://www.vmware.com/pdf/vsphere5/r55/vsphere-55-configuration-maximums.pdf

You consultant is rubbish, and out of date, I would find another who is current!
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by:gheist
gheist earned 250 total points
ID: 40427462
Vmfs 3 maximum is 2TB
Vmfs 5 maximum is larger than any storage
2tb is limit for live resize on vmfs5
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by:iamuser
ID: 40440231
Okay let me double confirm this

with VMFS-5 I can have a LUN that is greater than 2TB

with VMFS-5 I can have VM's with bigger than 2 TB VMDKs

So hypothetically with Vpshere 5.5 and VMFS-5 i can have a LUN that is 5TB that is storing a VM with a 3 TB VMDK file. Is this correct?
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Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 
LVL 119
ID: 40440265
with VMFS-5 I can have a LUN that is greater than 2TB

That is correct.

with VMFS-5 I can have VM's with bigger than 2 TB VMDKs

Not quite, you will need ESXi, 5.5 to create virtual machine disks larger than 2TB as well.

So hypothetically with Vpshere 5.5 and VMFS-5 i can have a LUN that is 5TB that is storing a VM with a 3 TB VMDK file. Is this correct?

That is correct.
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Author Comment

by:iamuser
ID: 40440377
Thanks, I do not understand why the consultant is telling me there is still a 2 TB limit every time I ask why we can't upgrade to VMFS-5
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LVL 119
ID: 40440423
email the PDF above to him, and ask him to explain, why it says 62TB next to vmdk!
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Expert Comment

by:gheist
ID: 40440766
Above 2TB you cannot resize VMDK without reboot. So it is of marginal added value.
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Author Comment

by:iamuser
ID: 40440854
That's okay since the only reason we need to resize is because we don't have enough space to begin with.
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