Hi Radoslaw,

I am trying to backup data to two HDDs using two USB dockings. I tried the configurations as below but still failed.

#bacula-sd.conf
Autochanger {
  Name = usb-changer-1
  Device = usb-changer-1-drive-0
  Device = usb-changer-1-drive-1
  Changer Command = ""        #if not added, got error
  Changer Device = /dev/null    #if not added, got error
}

Device {
  Name = usb-changer-1-drive-0
  Drive Index = 0
  Autochanger = yes;
  Device Type = File
  Media Type = Disk
  Archive Device = /mnt/usbdocking1
  LabelMedia = yes;               
  Random Access = Yes;
  AutomaticMount = yes;
  RemovableMedia = no;
  AlwaysOpen = yes;
  Maximum Concurrent Jobs = 5
}

Device {
  Name = usb-changer-1-drive-1
  Drive Index = 1
  Autochanger = yes;
  Device Type = File
  Media Type = Disk
  #Archive Device = /mnt/usbdocking1
  Archive Device = /mnt/usbdocking2

  LabelMedia = yes;               
  Random Access = Yes;
  AutomaticMount = yes;
  RemovableMedia = no;
  AlwaysOpen = yes;
  Maximum Concurrent Jobs = 5
}

#bacula-dir.conf

JobDefs {
  Name = "TestJob"
  Type = Backup
  Level = Full
  Client = bacula-fd
  FileSet = "Test Backup"
  Storage = usbchanger1
  Messages = Standard
  Pool = TestPool
  Priority = 11
}


Storage {
  Name = usbchanger1
  Address = localhost
  SDPort = 9103
  Password = "WfYdG2,/8P"
  Device = usb-changer-1
  Media Type = File
  Autochanger = yes;
}

Pool {
  Name = TestPool
  Pool Type = Backup
  Recycle = no
  AutoPrune = yes
  Volume Retention = 7 days
  Label Format = Test-
}


#Error
27-May 19:18 bacula-dir JobId 867: Start Backup JobId 867, Job=TestBkup.2014-05-27_19.18.40_03
27-May 19:18 bacula-sd JobId 867: Fatal error: Device reservation failed for JobId=867:
27-May 19:18 bacula-dir JobId 867: Fatal error:
     Storage daemon didn't accept Device "usb-changer-1" because:
     3924 Device "usb-changer-1" not in SD Device resources or no matching Media Type.

27-May 19:18 bacula-dir JobId 867: Error: Bacula bacula-dir 5.2.13 (19Jan13):
  Build OS:               x86_64-unknown-linux-gnu redhat
  JobId:                  867
  Job:                    TestBkup.2014-05-27_19.18.40_03
  Backup Level:           Full
  Client:                 "bacula-fd" 5.2.13 (19Jan13) x86_64-unknown-linux-gnu,redhat,
  FileSet:                "Test Backup" 2014-05-27 12:40:48
  Pool:                   "TestPool" (From Job resource)
  Catalog:                "MyCatalog" (From Client resource)
  Storage:                "usbchanger1" (From Job resource)
  Scheduled time:         27-May-2014 19:18:38
  Start time:             27-May-2014 19:18:42
  End time:               27-May-2014 19:18:42
  Elapsed time:           0 secs
  Priority:               11
  FD Files Written:       0
  SD Files Written:       0
  FD Bytes Written:       0 (0 B)
  SD Bytes Written:       0 (0 B)
  Rate:                   0.0 KB/s
  Software Compression:   None
  VSS:                    no
  Encryption:             no
  Accurate:               no
  Volume name(s):
  Volume Session Id:      1
  Volume Session Time:    1401189512
  Last Volume Bytes:      0 (0 B)
  Non-fatal FD errors:    1
  SD Errors:              0
  FD termination status:
  SD termination status:
  Termination:            *** Backup Error ***

When changed Media Type from "Disk" to "File', I could run the job but a new volume was created on usbdocking1 but not usbdocking2 when HDD is full on usbdocking1? If using same archive device (e.g. usbdocking1), it won't backup on to another even the HDD is full.
Any hints? Thanks in advance!