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Appendix B Components B-43
B.26 Switch Backplane
Switch backplane (SWBP) is a PCB that has connectors to connect Media BP to
multiple IOUs. The SWBP is a unit that switches between IOUs to set which IOU is
to control the CD-RW/DVD-RW drive unit and the tape drive unit (TAPEU). One
SWBP unit can be mounted on the M8000 and M9000 (base cabinet), and two units
can be mounted on the M9000 (with expansion cabinet).
FIGURE B-40 shows the SWBP.
FIGURE B-40 Switch Backplane (SWBP)
SWBP has the following characteristics.
■ Only cold replacement is available for the SWBP.
■ Twelve ports of expander are mounted to control eight IOUs, one CD-RW/DVD-
RW drive unit, and one tape drive unit.
■ XSCF controls the settings for switching.
■ It supplies the power (12 V, 5 V) to Media backplane (CD-RW/DVD-RW drive
unit and tape drive unit).