I was trying to create a (very) large Datastore on VMWare vSphere 4.1 but although VMWare correctly identifies the LUN on my SAN it refuses to create the Datastore and gives me this error:

Call HostDatastoreSystem.QueryVmfsDatastoreCreateOptions for object ha-datastoresystem on ESX failed.
The complete error text is

Call “HostDatastoreSystem.QueryVmfsDatastoreCreateOptions” for object “ha-datastoresystem” on ESX “<IP of ESX>” failed.

The strange thing is that VMWare detects the partition and identifies the correct size (2,18 TB in this case):

VMWare vSphere 4.1 Current Disk Layout

It seems though that VMWare is simply unable to handle such a large partition as the error is not present on smaller partitions.