Whether I create a datastore on my 2Tb WD-Red HDD from the Vsphere webclient or the Vsphere client, I end up with a datastore which is much smaller.
I just created a datstore on this disk, using the "full disk" option in the Vsphere webclient. Then I try to install Ubuntu server and during install the Ubuntu setup sees 17,2 Gb and offers to use that. No 2 Tb or something in that range.
I see that with the former VMFS3 one could set the block size to 8Mb. With ESXi 6 that isn't possible anymore; one has to use VMFS5 with a fixed block size of 1Mb.
Evidently I am missing something, but what????
NB: I use the HP-branded ESXi 6 update 2 on a Proliant microserver with 8Gb RAM. It is the free license I use (fresh). The disks are each in RAID0
I funally succeeded in being able to use the 2Tb hdd. In the Vsphere client I added this hdd as a new harddisk/datastore to an existing Ubuntu 14.04 VM, as an eagerly zeroed thick disk.
Before that I had tried, while there were no data stores on it, to add it as a new harddisk/datastore (thin) from the webclient. At that point it wanted only to make it 17,2Gb. In the Vsphere client idem. Maybe they got confused by something?