thanks jaclaz.
all those numbers are chinese characters for me, you have to think I'm a little bit ignorant.
so you don't recommend anyone the usage of Paragon/ Hitachi/ Seagate GPT tool.
what do you mean by ''may add complexity'' ??
if one HDD is partitioned with one of those tools it might not be recognized and I could not access the data if I ever plug it on a W7-8-10 computer ?
Gdisk is the susbtitute of Diskpart ? in my personal case why I would ever need this tool ?
btw I don't know why dencorso user claims that XP 64 can't formating in GPT mode...