The Series 9x8 systems are housed in small cabinets. Each small rack-mount
cabinet contains the system processor unit (SPU), a channel input/output (CIO)
expander, and the battery backup unit. The cabinet can also contain various
peripherals.
Brief descriptions of the components of Series 917LX through Series 967LX system
s are as follows:
The SPU houses system cards (memory, peripheral, processor) and the power suppl
y.
The Uninterruptible Power Supply (UPS) supplies power to memory cards
and selected devices in the event of a power failure.
The disk drive is a nonremovable drive used to store data. Several other disk
drive models can be connected to the system.
The tape drive is used initially to load the operating system. Several tape d
rives can be connected to the system.
The operating system resides on the system disk once it has been installed.
The system console is the terminal device designated to send and receive syste
m messages.
Several types of page printers and line printers can be connected to the syste
m.
