Hello,
Thanks for your quick reply.
Initially i have installed ESXi 5.0 and I am almost 100% sure that VMFS version was 5 (I have installed it more than 6 months ago and of course it wasn't documented)
Output of the partedUtil getUsableSectors "/vmfs/devices/disks/mpx.vmhba1:C0:T1:L0" command is:
1 3895451647
EDIT: It was fresh ESX5 installation so there was not an update of VMFS.