Znyx Networks bh5700 Manuale Utente

This chapter includes basic information about the OpenArchitect switch environment including 
an overview of the file system structure, modifying and updating switch files, upgrading the 
switch driver and kernel, and implementing a system recovery.

The OpenArchitect switch is equipped with a Random Access Memory (RAM) disk and three 
Read Only Memory (ROM) devices, including, a boot ROM and two application flash 

The boot ROM is located on device 0 and contains the OpenArchitect zmon application that 
operates as a boot loader and includes a device bootstring. Device 1 contains the application 
flash 1 image of the Linux operating system and the OpenArchitect overlay file system. 
Application flash 1 is the primary working image for the switch. Device 2 contains the 
application flash 2 that is an exact copy of application flash 1. You would only boot from this 
device if application flash 1 is corrupted and you need to restore the switch to the factory-shipped 
configuration. 

Ethernet Switch Blade User's Guide

release  3.2.2j

page 138

zmon

Free space

Offset 7f000

dev

bootstring

Offset 0

initrd

Linux and

its file

system

Free space

overlay

file system

Offset 0

initrd

(exact copy

as in

Application

Flash 1)

Linux and its

file system

Free space