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/usr/share/doc/tgt/examples/targets.conf.vtl.MSL2024 is in tgt 1:1.0.63-1ubuntu1.

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# Virtual tape library example for an HP MSL-2024 tape library
#
# In this case, tapes are stored in the directory /root/tapes
# size is in MB (1 GB in this case)
# using the command "tgtimg --op=new --device-type=tape --barcode="A00000001" --size=10240 --type=data --file=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=A0000001,sides=1"
# for slot 0 (is nr 1000)
#
# Please note that an MSL-2024 has no IMPORT/EXPORT elements (type 3)

include /etc/tgt/temp/*.conf

default-driver iscsi

<target iqn.2008-09.com.example:server.tape>
    allow-in-use yes
#
# We need a backing store, although the tape drive will be empty,
# so we create a dummy tape "notape" in directory /root/tapes
# with the command "tgtimg --op=new --device-type=tape --barcode="" --size=1 --type=clean --file=notape"
#
    <backing-store /root/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>
#
# For the tape changer we need also a backing store, this can be a file containing zeros, like this:
# "dd if=/dev/zero of=$HOME/smc bs=1k count=1"
#
    <backing-store /root/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=/root/tapes
        # Type 2: Storage Elements (tape slots)
        params element_type=2,start_address=1000,quantity=24,media_home=/root/tapes
        # Type 4: Add Data Transfer devices (drives)
        params element_type=4,start_address=2,quantity=1,media_home=/root/tapes
        params element_type=4,address=2,tid=1,lun=1
    </backing-store>
</target>