VMFS-3
VMFS-3 Block Sizes are assigned to Datastores when created and determine the maximum file size that can be stored.
Here are the VMFS-3 Block sizes and corresponding file sizes
1MB = 256GB
2MB = 512GB
4MB = 1TB
8MB = 2TB
Once set this cannot be changed.
Sub-block allocation size
64KB
VMFS-5
Only hosts running ESXi 5 or later support VMFS-5. Hosts running ESXi 4.x will not be able to see or access VMFS-5 Datastores
VMFS-5 Datastores can be up to 64TB on a single extent
Datastores built on extents are still limited to 64TB as well.
Here is the VMFS-5 Block sizes and corresponding file size
1MB = 2TB
Sub-block allocation size
8KB
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