ESXi 6.5 runs ext3 or ext4?

There are limitations from different storage as to how big of a LUN can be allocated to ESXi as a datastore.

Mostly I’ve heard 2TB is the limitation with ext3. So just want to know what is used in ESXi 6.5 … ext 3 or 4?
Vivek SoniAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I'm a little confused, the maximum lun size for ESXi 6.5 is 64 TB

see Page 13
Configuration Maximums vSphere 6.5

LUNs are formatted as VMFS.
Vivek SoniAuthor Commented:
Apparently, storage from certain vendors Support 2TB as max LUN size to be presented as 1 volume to ESXi. Someone mentioned that that’s a limitation with ext3 on ESXi but not with ext4. With ext4 you can allocate denser volume to ESXi.

Hence my question. No doubt ESXi can support 64TB as a single volume.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
All LUNS are formatted as VMFS.

ext3, ext4 is not used to store VMs.

With older versions of VMFS3, there were limitations

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Vivek SoniAuthor Commented:
So that would mean that any storage vendor can allocate multiple volumes of up to 64TB  to an ESXi 6.5 cluster, correct?

Also, can there be limitations regarding this subject matter from storage perspective?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
yes, or one single volume (LUN) up to 64TB.

no limitations any more up to 64TB.
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