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Difference between VMFS3 and VMFS5

Capability VMFS 3 VMFS 5
Maximum single Extend size 2 TB  less 512 bytes 64 TB
Partition Style MBR (Master Boot Record) style GPT (GUID Partition Table)
Available Block Size 1 MB/2MB/4MB/8MB  only 1 MB
Maximum size of RDM in
Virtual Compatibility
2 TB  less 512 bytes 2 TB  less 512 bytes
Maximum size of RDM in
Physical Compatibility
2 TB  less 512 bytes 64 TB
Supported Hosts versions ESX/ESX 3.X, 4.X & 5.x Only ESXi 5 is supported
Spanned Volume size 64 TB (32 extends with max
size of extent is 2 TB)
64 TB (32 extends with
any size combination)
Upgrade path VMFS 3 to VMFS 5 Latest Version. NO upgrade
available yet.
File Limit 30,000 100,000
Sub-Block size 64 KB 8 KB

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