dd if=/dev/zero of=/dev/sdb bsize=512 count=1

#!/usr/bin/env bash
dev=${1:-sda}
dev=${dev#/dev/}
for part in /sys/class/block/${dev}[0-9]*; do
    num=$(<$part/partition)
    start=$(<$part/start)
    size=$(<$part/size)
    end=$((start+size-1))
    echo "# partition $num: start $start, size $size, end $end"
    echo "sgdisk /dev/$dev --new=$partnum:$start:$end"
    #echo "parted /dev/$dev mkpart primary $start $end"
done