The Series 917LX through Series 967LX systems and the Series 937 through
Series 977 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. For further details about the operation of Series 917LX through
Series 967LX systems, please refer to Using Your System - HP 3000 Series 9X7LX (A1707-92002).
Figure 12-2 Series 9x7LX and 9x7 Systems
![[Series 9x7LX and 9x7 Systems]](img/lg185088.gif)
Brief descriptions of the components of Series 917LX through Series 967LX systems are as follows:
The SPU houses system cards (memory, peripheral, processor) and the power supply.
The battery backup unit (BBU) supplies power to memory cards 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 drives 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 system messages.
Several types of page printers and line printers can be connected to the system.
