gistfile1.txt

#!/bin/sh              

set -x
set -e

DEV=/dev/sdb

if ! sudo parted -lm 2>/dev/null | grep scsi | grep "$DEV" > /dev/null; then
	echo "refusing to work on a device that is not a scsi disk" >&2
	exit 1
fi

if sudo fdisk -l "$DEV" | grep "^$DEV" > /dev/null; then
	echo "refusing to work on partitioned drive" >&2
	echo "if you are sure, you might want to call `sgdisk --zap-all $DEV`" >&2
	exit 1
fi

sudo sgdisk --new 0:0:100M --new 0:0:0 "$DEV"