HP 2600fx - Optical Disk Drive Command Reference Manual page 216

In the descriptions below, XX and YY are abbreviations of the element
types such as MT or ST.
StorXX When this bit is set to 1, the XX element type provides
independent storage for a cartridge.
If the StorXX bit is set to 0, it indicates that elements of
that type provide virtual sources or destinations, and
the storage location of the cartridge is provided by an
element of some other type.
XX->YY - Move
Medium A returned bit value of 1 indicates that the library
supports Move Medium commands from the XX (source)
element to the YY (destination) element. See Table 3-68
on page 3-64 for additional information on the Move
Medium command.
A returned bit value of 0 indicates that Move Medium
commands from the XX element to the YY element are
not supported and will be rejected, with ILLEGAL
REQUEST.
XX<>YY -
Exchange
Medium A returned bit value of 1 indicates that the library
supports Exchange Medium commands where the
source is element type XX and destination 1 is element
type YY, and destination 2 is of the same type as the
source element.
An XX<>YY field returned bit value of 0 indicates that
these Exchange Medium commands will be rejected
with ILLEGAL REQUEST. See Table 3-69 on page 3-66
for additional information on the Exchange Medium
Command.
Chapter 3
Jukebox SCSI-2 Command Set
Mode Sense Command (1AH)
3-29