Bacula SMB disk rotation

//bacula_rotate.sh

#!/bin/bash

#Rotate disks domain

disk1=wdmc1.domain.local
disk2=wdmc2.domain.local
disk3=wdmc3.domain.local

synology=synology.domain.local

backup_path="/media/backup_r"

function isAvailable {
cmd="/usr/bin/smbclient -E -L \\\\$1 -l /dev/null -A /root/bacula/bin/.creds2"
SMBtest="$($cmd)"
err=$?
echo $err
}

function doMount {

/bin/umount -l $backup_path 2>&1
/bin/mount -t cifs //$1/backups $backup_path -o credentials=/root/bacula/bin/.creds2,dir_mode=0770,file_mode=0770

}

d1=$(isAvailable $disk1)
d2=$(isAvailable $disk2)
d3=$(isAvailable $disk3)
d4=$(isAvailable $synology)

if [[ $d1 -eq 0 ]]; then

echo "$disk1 mount in progress..."
doMount $disk1

else

    if [[ $d2 -eq 0 ]]; then

        echo "$disk2 mount in progress..."
        doMount $disk2

    else

        if [[ $d3 -eq 0 ]]; then

        echo "$disk3 mount in progress..."
        doMount $disk3

        else

            if [[ $d4 -eq 0 ]]; then

            echo "$synology mount in progress... Last chance to backup... After this no backups."
            doMount $synology

            else

            echo "No backup disks to mount! ERROR!"
                echo "No BACKUP disks and destinations available!" | mail -s "NO BACKUP DISKS Available! NO Backup destination!!" admin@domain.local
            exit 1;
            echo $?

            fi

        fi

    fi

fi