#!/bin/bash

set -e

MD_DEVICE=$1
shift

NEW_NUM_RAID_DEVICES=$1
shift

BACKUP_FILENAME=$1
shift

# TODO: disable bitmap if it exists and renable later

for device in "$@" ; do
    mdadm $MD_DEVICE --add $device
done

mdadm --grow $MD_DEVICE --raid-devices $NEW_NUM_RAID_DEVICES --backup-file "$BACKUP_FILENAME"