$ cat /etc/tgt/targets.conf
include /etc/tgt/temp/*.conf
default-driver iscsi
#<target priv.cross.mendrisio:crosrv04.notape>
#    allow-in-use yes
#    <backing-store /media/tgt/tapes/notape>
#        lun 1
#        device-type tape
#        removable 1
#        vendor_id "HP      "
#        product_id "Ultrium 3-SCSI  "
#        product_rev "D21W"
#        scsi_sn "HU012345AB"
#        scsi_id "HP LTO3 ULTRIUM"
#    </backing-store>
#</target>


# In this case, tapes are stored in the directory /media/tgt/vtl
# size is in MB (1 GB in this case)
# using the command
# tgtimg --op=new --device-type=tape --barcode="A00000001" --size=400000 \
#        --type=data --file=/media/tgt/vtl/A00000001
#
# The tapes can be added after startup with
# tgtadm --lld iscsi --mode logicalunit --op update --tid 1 --lun 4 \
#        --params element_type=2,address=1000,barcode=A00000001,sides=1
# for slot 0 (is nr 1000)
#
# Please note that an MSL-2024 has no IMPORT/EXPORT elements (type 3)


<target priv.galimberti:galtorage01.vtl>
    allow-in-use yes
        #
        # We need a backing store, although the tape drive will be empty,
        # so we create a dummy tape "cleaning" in directory /media/tgt/vtl
        # with the command
        # tgtimg --op=new --device-type=tape --barcode="" --size=1 --type=clean \
        #        --file=/media/tgt/vtl/cleaning
        #
    <backing-store /media/tgt/vtl/cleaning>
        lun 1
        device-type tape
        removable 1
        vendor_id "HP      "
        product_id "Ultrium 3-SCSI  "
        product_rev "D21W"
        scsi_sn "HU012345AB"
        scsi_id "HP LTO3 ULTRIUM"
    </backing-store>

        #
        # For the tape changer we need also a backing store, this can be a file
        # containing zeros, like this:
        # dd if=/dev/zero of=/media/tgt/smc bs=1k count=1
        #
    <backing-store /media/tgt/smc>
        lun 4
        device-type changer
        removable 1
        vendor_id "HP      "
        product_id "MSL G3 Series   "
        product_rev "3.00"
        scsi_sn "ABC01234G3"
        # Dummy 'page 0'
        mode_page "0:0:0"
        # Page 0x02: Disconnect/Reconnect SPC-3
        mode_page "0x02:0:14:0x80:0x80:0:0xa:0:0:0:0:0:0:0:0:0:0"
        # Page 0x1a: Power Condition SPC-3
        mode_page "0x1a:0:18:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0"
        # Page 0x1c: Informational Exceptions Control SPC-3
        mode_page "0x1c:0:10:8:0:0:0:0:0:0:0:0:0"
        # Page 0x1d: Element Address Assignment SMC-3 7.3.4
        mode_page "0x1d:0:0x12:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0"
        # Page 0x1e: Transport Geometry Parameters SMC-3 7.3.5
        mode_page "0x1e:0:2:0:0"
        # Page 0x1f: Device Capabilities SMC-3 7.3.2
        # Page 0x1f/Subpage 0x41: Extended Device Capabilities SMC-3 7.3.3
        mode_page "0x1f:0:0x12:0x0f:7:0x0f:0x0f:0x0f:0x0f:0:0:0:0:0x0f:0x0f:0x0f:0x0f:0:0:0:0"
        # Type 1: Medium Transport Elements (robot arm/picker)
        params element_type=1,start_address=1,quantity=1,media_home=/media/tgt/vtl
        # Type 2: Storage Elements (tape slots)
        params element_type=2,start_address=1000,quantity=24,media_home=/media/tgt/vtl
        # Type 4: Add Data Transfer devices (drives)
        params element_type=4,start_address=2,quantity=1,media_home=/media/tgt/vtl
        params element_type=4,address=2,tid=1,lun=1
    </backing-store>
</target>