#!/bin/sh

show() {
	local up idle msg="$1"
	read up idle </proc/uptime
	echo "---" "[$up]" "$msg" "---"
	grep "${DEV##*/}" /proc/partitions
}

set -e

DEV="/dev/vdb"

show "start"
out=$(echo "2048,$((1024*1024))" | sfdisk --no-reread --unit=S --force "$DEV" 2>&1)
[ $? -eq 0 ] || { echo "faild sfdisk"; exit 1; }
udevadm settle
show "after sfdisk"

sleep 3
show "before dd"
out=$(dd if=/dev/zero of=$DEV bs=1M count=1 2>&1)
show "after dd"

udevadm settle
show "after settle"

sleep 1
show "after sleep"