always, vma 5.5. And vMotion works 
vi-admin@vma:~[esxi1]> vicfg-hostops -o info
Host Name : esxi1
Manufacturer : VMware, Inc.
Model : VMware Virtual Platform
Processor Type : Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
CPU Cores : 2 CPUs x 3410 GHz
Memory Capacity : 8191.48828125 MB
VMotion Enabled : no
In Maintenance Mode : no
Last Boot Time : 2014-03-27T10:44:55.793853Z
Where is hostops looking for that info ?