User guide

System Management File system
iMG/RG Software Reference Manual (System Configuration)
1-8
FIGURE 1-2 8 MByte Flash Memory partition
1.1.3.3 Boot partition
The Boot ROM program resides in a special partition (the Boot Partition) on the flash device. This is the first
code that runs when the system is booted and provides self-test code as well as the ability to load the main
run-time images.
The boot partition cannot be read or written by the flashfs process and typically doesn’t require upgrade. The
boot partition is automatically over-written when the gateway is upgraded using a flash image. In all the other
cases the boot ROM program and boot partition are never altered.
1.1.3.4 Recovery partition
The Recovery Partition is a reserved partition on the flash device where a minimal operating system named
Recovery Application code is installed. This operating system runs only if the boot ROM code is not able to
start the main application code if for example, because the main partition has been corrupted by a system
power-off during software upgrade.
Services available in Recovery Application Code are a subset of those available in the Main Application Code:
for example VoIP modules, SSH and SNMP access are not available.
Configuration Partition 1
(256 KByte)
Configuration Partition 2
(128 KByte)
Main Partition
(3200 KByte)
Recovery Partition
(768 KByte)
Boot Partition
(128 KByte)