The luxadm display command will only work on FC attached tape drives.

When SCSI-attached tape drives are in play, it's better to revert to the luxadm inq command, which works for both FC- and SCSI-attached tape drives and provides the same information needed for this task (i.e. the drive's serial number).

Ex : (on a SCSI-attached tape drive)

-bash-3.00# luxadm display /dev/rmt/1cbn
 Error: Device's Node WWN is not found in the WWN list.
 - /devices/pci@8,700000/scsi@6,1/st@2,0:cbn.

-bash-3.00# luxadm inq /dev/rmt/1cbn

INQUIRY:
  Physical Path:
  /devices/pci@8,700000/scsi@6,1/st@2,0:cbn
Vendor:                     HP      
Product:                    Ultrium 2-SCSI  
Revision:                   F3A0
Serial Number               HUL4K04232
Device type:                0x1 (Tape device)
Removable media:            yes
Medium Changer Element:     no
ISO version:                0
ECMA version:               0
ANSI version:               3 (Device complies to SCSI-3)
Terminate task:             no
Response data format:       2
Additional length:          0x5b
SIP Bits:                   1, 1, 0
Command queueing:           no
              VENDOR-SPECIFIC PARAMETERS
Byte#                  Hex Value                             ASCII
36    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00     ................
      00 00 00 00