看看本机内核是否有gpt支持
%grep -i gpt /sys/amd64/conf/GENERIC
options GEOM_GPT # GUID Partition Tables.
查看gpt手册
%man gpt
# gpt create -f /dev/da0
# gpt add -t ufs /dev/da0
# gpt label -a -l big /dev/da0
# newfs -m 0 -b 32768 -f 8192 /dev/da0p1
# reboot
# df -h
# iostat da0
