時間:2015/7/1
掛載usb
# mkdir /mnt/sda1 # mount_msdosfs /dev/da0s1 /mnt/sda1
卸載usb
# umount /mnt/sda1 //必須要離開sda1目錄才可卸載
格式化usb
# newfs_msdos /dev/da0s1