I believe just to make sure it is an OS relate issue, you should make sure it is seen at the HW level using probe-scsi-all.
If you can not figure out if you see the device on the output, if possible post it if not kind of tell us what you see,
for the heck of it tried these, I doubt they will work but it is worth a try.
ULTRIUM =1,0x36,0,0x2D639,4,0x00,0x00,0x00,0x40,3;
LTO-data =1,0x3b,0,0x2D639,4,0x00,0x00,0x00,0x42,3;