how to enable or disable change tracking for the virtual machine's disks?
vm admin privilege name : disk change tracking
Is this privilege same as change block tracking(CBT)?
AFAICT, it is the same as CBT.
Is there any way to perform this action using powercli?
Should be doable. I haven't tried the below steps, but seems to be simplistic in execution
http://www.itwalkthru.com/2012/03/disabling-or-enabling-vmware-change.html
http://www.robertwmartin.com/?p=274
HTH,
zXi