Boot process in aix
If you are going to attend any interview, there
might be the chance of asking the question about boot process at that time you can explain the boot process like the below. (Instead of telling all the detailed
steps, we can tell the important thing to make the interviewer understand
easily)
Remember this is only for interview purpose
1. Three phases are there in the boot process
1. Ros
kernel init phase
2. Base
device configuration
3. System
boot phase
1. ROS (Read only storage) kernel init phase:
Problem of the mother
board checked
POST (Power on self test) {all the peripheral devices are checked}
Boot list is found and
boot image is loaded into memory
System initialization
start
2. Base
device configuration:
All the devices and FS
are configured with the help of cfgmgr.
3. System
boot phase:
All the logical volumes
are ‘varied on’
Paging is getting started
Process defined in /etc/inittab file are initiated by init process
The system is getting up
with the default runlevel 2.
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Notes:
ü After the BLV is loaded
into RAM, the rc.boot script is executed three times to configure the system.
ü During rc. Boot1, Base devices to activate rootvg is configured
ü During rc.boot 2, rootvg
is varied on.
ü In rc.boot3, remaining
devices are configured.
ü Content of BLV: AIX
Kerne, Boot commands, rc.boot, Reduced odm
