6.7

Table Of Contents
You can increase the capacity of the datastore while the virtual machines are running on the datastore.
This ability lets you add new space to your VMFS datastores as your virtual machine requires it. VMFS is
designed for concurrent access from multiple physical machines and enforces the appropriate access
controls on the virtual machine files.
Versions of VMFS Datastores
Several versions of the VMFS file system have been released since its introduction. Currently, ESXi
supports VMFS5 and VMFS6.
For all supported VMFS version, ESXi offers complete read and write support. On the supported VMFS
datastores, you can create and power on virtual machines.
Table 172. Host Access to VMFS Versions
VMFS ESXi
VMFS6 Read and write
VMFS5 Read and write
VMFS3 Not supported. For information about upgrades to VMFS5, see Upgrading VMFS
Datastores.
The following table compares major characteristics of VMFS5 and VMFS6. For additional information, see
Configuration Maximums .
Table 173. Comparing VMFS5 and VMFS6
Features and Functionalities VMFS5 VMFS6
Access for ESXi hosts version 6.5 and later Yes Yes
Access for ESXi hosts version 6.0 and earlier Yes No
Datastores per host 512 512
512n storage devices Yes Yes (default)
512e storage devices Yes. Not supported on local
512e devices.
Yes (default)
4Kn storage devices No Yes
Automatic space reclamation No Yes
Manual space reclamation through the esxcli command. See
Manually Reclaim Accumulated Storage Space.
Yes Yes
Space reclamation from guest OS Limited Yes
GPT storage device partitioning Yes Yes
MBR storage device partitioning Yes
For a VMFS5 datastore that
has been previously
upgraded from VMFS3.
No
Storage devices greater than 2 TB for each VMFS extent Yes Yes
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