Optical Drive and Library SCSI-2 Command Reference

Jukebox SCSI-2 Command Set
Read Element Status Command (B8H)
Chapter 33-76
IDValid When set to 1, the SCSI Bus Address field contains valid
information.
LUValid When set to 1, the logical unit number field contains
valid information.
Logical Unit
Number If valid, provides the logical unit number within the
SCSI bus address of the device served by the jukebox at
this element.
SValid When set to 1, the source storage element address field
and the invert bit information are valid.
Invert When set to 1, the cartridge in the element was inverted
by a move operation since it was last in the source
storage element.