Hello Andrew,
I'm affraid your /dev/nst1 is your first drive (índex 0) and /dev/nst0 is your second drive (índex 1). From your mt status output, you have /dev/nst1 online with a tape loaded (i suspect this is the 44:000002L6 tape). Could you try changing this in your bacula-sd.conf (/dev/nst1 -> drive índex 0 and /dev/nst0 -> drive índex 1)?
Also, for your I/O slots being recognized by mtx-changer script, you need to do a modification inside de section for the "list" command:
if test ${vxa_packetloader} -ne 0 ; then
cat ${TMPFILE} | grep " *Storage Element [0-9]*:.*Full" | sed "s/ Storage Element //" | sed "s/Full :VolumeTag=//"
else
# cat ${TMPFILE} | grep " Storage Element [0-9]*:.*Full" | awk "{print \$3 \$4}" | sed "s/Full *\(:VolumeTag=\)*//"
cat ${TMPFILE} | sed "s/ IMPORT\/EXPORT//" | grep " Storage Element [0-9]*:.*Full" | awk "{print \$3 \$4}" | sed "s/Full *\(:VolumeTag=\)*//"
fi
Best regards,
Ana