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Load/Backup Device
The load/backup device is the floppy disk drive (FD). The FD permits on-line backup storage of
critical system configuration information and system software. It also offers a rapid and reliable means
of copying new software to the hard disk. The floppy disk drive is also used to restore a system to
normal operation when replacing the hard disk.
The FD is connected to the CPU by a cable to the front of the CPU.
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Shelf B Motherboard
The shelf B Motherboard includes signalling for the system/voice SCSI bus. The system/voice SCSI
bus interconnects slots B3 through B5. This Motherboard distr5V and +12V power to slots B1
through B5. It includes an ID signal field for each slot. This ID field is used by the plug-in disk
assemblies for SCSI bus ID selection.
Slot B5 is used for the load/backup device, and includes SCSI bus signal connections and power
connections. In the case of a floppy device installed in this slot, only power is provided from the
Motherboard to the floppy device. The floppy device does not use the SCSI connection.
Shelf B Motherboard pr12V power connection to the fan tray.
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Shelf C Motherboard
The shelf C Motherboard provides system/voice SCSI bus connection, power distribution, and ID
signals to disk assemblies installed in slots C1 through C4.
Toshiba VP Systems Release 7.1 July, 1994
HARDWARE
1-15
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