HP 2600fx - Optical Disk Drive Command Reference Manual page 300

Destination 1 Element
Bit Map
(Byte 56) Indicates the status of the element that was the First
Destination of the Exchange command after the failure
or retry of the command.
7 - Valid 1= the values in this byte and the Element
Number are valid.
6 - Reserved
5 - Cartridge in Transport 1 = the cartridge originally in
this element is still in the transport.
4 - Cartridge in Element 1 = after all recovery
algorithms have been exhausted, the cartridge being
moved from this element remained in this element.
3-0 Reserved
Destination 2 Element
Bit Map
(Byte 57) Indicates the status of the element that was the
Destination Element of a move or Second Destination of
the Exchange command after the failure or retry of the
command.
7 - Valid 1 = the values in this byte and the Element
Number are valid.
6 - Reserved
5 - Cartridge in Transport 1 = the cartridge being moved
to this element is still in the transport.
4 - Cartridge in Element 1 = the cartridge being moved
to this element is in this element after all recovery
algorithms have been exhausted.
3-0 Reserved
Appendix B
Autochanger Error Codes
Additional Sense Data Format for Error Recovery
B-13