System startup refers to the procedure for starting the computer
operating system and other programs. It does not refer to physically
installing the hardware, loading the fundamental operating system (FOS),
or to turning on the power to the computer, disk drives, tape drives,
printers, or the system console. (Normally, computer hardware remains
powered on.)
As the system manager, you need to know when to start the system and when
and why to shut it down. In general, you are not the person who performs
the actual procedures.
In this chapter, you can find the following topics:
deciding when to start the system
saving main memory to tape
changing to a different version of the operating system
using initial system loader (ISL) commands
using the standalone initial system loader (ISL) utilities
enabling the access port (AP)
