VM disk shrinking (.raw) using ZFS storage

I have the free space at the end of the disk (500GB of 700GB). So I made a partition of it and have zeroed it.

I think that time spent on this problem was more than I wanted :) The workaround as as posted earlier in this thread is satisfied, so I don't want and don't have time to research it futher.

Anyway, thanks for help and all of the advices, LnxBil. I appreciate it.