Passing SATA DVD burner to VM?

[NAS-newbie]

I am trying to pass in my DVD burner to a Ubuntu Linux VM to be able to BURN DVDs/BDs with data from the array. The burner is on the same controller as some of the array disk.

"lsscsi" and "System devices tab" lists it as "[9:0:0:0]    cd/dvd  Optiarc  DVD RW AD-7200A  1.08  /dev/sr0"

Executing "cat /proc/sys/dev/cdrom/info" in UNRAID shows:
CD-ROM information, Id: cdrom.c 3.20 2003/12/17

drive name:             sr0
drive speed:            48
drive # of slots:       1
Can close tray:         1
Can open tray:          1
Can lock tray:          1
Can change speed:       1
Can select disk:        0
Can read multisession:  1
Can read MCN:           1
Reports media changed:  1
Can play audio:         1
Can write CD-R:         1
Can write CD-RW:        1
Can read DVD:           1
Can write DVD-R:        1
Can write DVD-RAM:      1
Can read MRW:           0
Can write MRW:          0
Can write RAM:          1

 

I do not know KVM virtualization very well so trying to follow various answers in forums and is right now trying:

 

<hostdev mode='subsystem' type='scsi' managed='no'>

      <source>

        <adapter name='scsi_host9'/>

        <address bus='0' target='0' unit='0'/>

      </source>

      <address type='drive' controller='1' bus='0' target='0' unit='0'/>

</hostdev>

but I am not sure if this is right or how to find what to specify for "controller". The commands "hwinfo --storage-ctrl" and "hwinfo --disk" is not avaialble in UNRAID. 

 

Anyhow this setting do result in the DVD to show up in the VM but NOT as a writer 😞

 

In the VM "lsscsi" shows:
[1:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.5+  /dev/sr1
[4:0:0:0]    cd/dvd  Optiarc  DVD RW AD-7200A  1.08  /dev/sr0
[9:0:0:0]    cd/dvd  QEMU     QEMU DVD-ROM     2.5+  /dev/sr2
and "cat /proc/sys/dev/cdrom/info":
CD-ROM information, Id: cdrom.c 3.20 2003/12/17

drive name:             sr2     sr1     sr0
drive speed:            4       4       1
drive # of slots:       1       1       1
Can close tray:         1       1       1
Can open tray:          1       1       1
Can lock tray:          1       1       1
Can change speed:       1       1       0
Can select disk:        0       0       0
Can read multisession:  1       1       1
Can read MCN:           1       1       1
Reports media changed:  1       1       1
Can play audio:         1       1       1
Can write CD-R:         0       0       0
Can write CD-RW:        0       0       0
Can read DVD:           1       1       0
Can write DVD-R:        0       0       0
Can write DVD-RAM:      0       0       0
Can read MRW:           1       1       0
Can write MRW:          1       1       0
Can write RAM:          1       1       0

 

Any suggestions on what I can try to make it available with write capability?