return 1
	fi

	for ((i = 0; i < 20; i++)); do
		test -f ${WORK_DIR}/$1/1/.minio.sys/format.json
		v1=$?
		nextInES=$(($1 + 1)) && [ $nextInES -gt 3 ] && nextInES=1
		foundFiles1=$(find ${WORK_DIR}/$1/1/ | grep -v .minio.sys | grep xl.meta | wc -l)
		foundFiles2=$(find ${WORK_DIR}/$nextInES/1/ | grep -v .minio.sys | grep xl.meta | wc -l)
		test $foundFiles1 -eq $foundFiles2
		v2=$?
		[ $v1 == 0 -a $v2 == 0 ] && return 0

	while [ "$u" != "0" ]; do
		sudo umount ${WORK_DIR}/mnt/disk4/
		u=$?
		sleep 1
	done

	# Wait until MinIO self heal kicks in
	sleep 60

	if [ -f ${WORK_DIR}/mnt/disk4/.minio.sys/format.json ]; then
		echo "A root disk is formatted unexpectedely"
		cat "${WORK_DIR}/server4.log"
		exit -1
	fi
}

function cleanup() {
	pkill minio
	sudo umount ${WORK_DIR}/mnt/disk{1..3}/