Figure 6.2: Boot Flow Chart - HP bh5700 User Manual

Under normal circumstances, the booting up process follows the process outlined in Figure 6.2.
During boot up, the zmon bootloader reads the device bootstring to locate and validate the
correct application image to load. The bootstring command is in the following format:
boot : X | [<options>]
The boot process opens and uncompresses the initrd image onto the RAM disk. Then zmon
begins booting the Linux image. After Linux boots, the init process executes the
/etc/init.d/rcS script which, in turn, executes /etc/rcZ.d/rc (see Figure 6.3: Init Script
Flow). The /etc/rcZ.d/rc script runs S* files in /etc/rcZ.d, with the start parameter. The S*
files are the switch configuration files (for example, S50layer2 ).
Ethernet Switch Blade User's Guide
Downloaded from www.Manualslib.com
Bootloader examines the
bootstring in the boot
ROM
Yes
Determines
if the boot string
is dev1
No
Determines
Yes
if the boot String
is dev2
No
Boot into
zmon bootloader

Figure 6.2: Boot Flow Chart

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Loads image
from Flash 1
to RAM
Loads image
from Flash 2
to RAM
Begins
execution of
RAM image
X represents the device value 0, 1 or 2
release 3.2.2j page 85