Installation guide

4-14 Booting
4.4 Booting Concepts
4.4.1 How Bootblock Booting Works
The boot program reads the primary bootstrap program from the
boot device. The primary bootstrap in turn boots the operating
system.
Figure 4-4 Boot Procedure
Bootblock with boot 
driver loads primary
bootstrap into memory
Enter boot command 
at the
console prompt


Primary bootstrap 
continues booting the 
operating system
Boot driver on the
primary processor reads
bootblock from boot device
System may reinitialize
and self-test 
is performed
BXB-0026B-92
Boot command specifies boot
device and path to reach it.
Boot driver invoked from console
running on boot processor.
Bootblock contains pointer
to primary bootstrap.
Primary bootstrap loaded into 
memory; console transfers 
control to primary bootstrap.
Self-test executes and prints if
boot_reset is set on.