You can set up VMFS datastores on any SCSI-based storage devices that your ESX host discovers. After you create the VMFS datastore, you can edit its properties.

You can have up to 256 VMFS datastores per system, with a minimum volume size of 1.2GB.

Note

Always have only one VMFS datastore for each LUN.

If your VMFS datastore requires more space, you can increase the VMFS volume. You can dynamically add new extents to any VMFS datastore and grow the datastore up to 64TB. An extent is a LUN or partition on a physical storage device. The datastore can stretch over multiple extents, yet appear as a single volume.

Another option is to grow the existing datastore extent if the storage device where your datastore resides has free space. You can grow the extent up to 2 TB.