"bacula erreur /dev/backup"

Je voulais faire une sauvegarde a l'aide de bacula . Installer et configurer avec succès mais le problème quand je fais backup , il m'affiche que c'est une erreur

J'ai installé bacula ... Et voici ce qui trouve dans les fichiers de configurations
Director { # define myself
Name = Master-dir
#DIRport = 9101 # where we listen for UA connections
QueryFile = "/etc/bacula/scripts/query.sql"
WorkingDirectory = "/var/lib/bacula"
PidDirectory = "/var/run/bacula"
Maximum Concurrent Jobs = 20
Password = "rdAN57eTIo4uIBaLEAGqmImU8Pz21Uc16" # Console password
Messages = Daemon
#DirAddress = 127.0.0.1
DirAddresses = {
ip = { addr = 192.168.1.47; port = 9101; }

}
}

Storage {
Name = File1
# Address = 192.168.1.47 here # N.B. Use a fully qualified name here

SDPort = 9103
Password = "irWoo5Xo3IuDHXv7kn3-FWwl6oMAEZNw0"
Device = /dev/backup
Media Type = Home
Maximum Concurrent Jobs = 10 # run up to 10 jobs a the same time


}
Pool {
Name = Home
Pool Type = Backup
Label Format = Local-
Recycle = yes # Bacula can automatically recycle Volumes
AutoPrune = yes # Prune expired volumes
Volume Retention = 365 days # one year
Maximum Volume Bytes = 50G # Limit Volume size to something reasonable
Maximum Volumes = 100 # Limit number of Volumes in Pool
}

Pool { Pool definition

Name = File
Pool Type = Backup
Recycle = yes # Bacula can automatically recycle Volumes
AutoPrune = yes # Prune expired volumes
Volume Retention = 365 days # one year
Maximum Volume Bytes = 50G # Limit Volume size to something reasonable
Maximum Volumes = 100 # Limit number of Volumes in Pool
Label Format = "Vol-" # Auto label
}

Mais lorsque je vais connecté sur la console et faible le label une erreur s'affiche le voici

# bconsole
Connecting to Director 192.168.1.47:9101
1000 OK: 1 Master-dir Version: 7.0.5 (28 July 2014)
Enter a period to cancel a command.

• label

Automatically selected Catalog: MyCatalog
Using Catalog "MyCatalog"
The defined Storage resources are:
1: File1
2: File2
Select Storage resource (1-2): 1
Enter new Volume name: file
Defined Pools:
1: Default
2: File
3: Scratch
4: RemoteFile
5: Home
Select the Pool (1-5): 1
Connecting to Storage daemon File1 at 192.168.1.47:9103 ...
Sending label command for Volume "file" Slot 0 ...
3999 Device "/dev/backup" not found or could not be opened.
Label command failed for Volume file.
Do not forget to mount the drive!!!