Recovering Primary Boot Devices; Why Compact Flash Recovery Might Be Necessary; Recommended Recovery Hardware And Software; Configuring Internal Compact Flash Recovery - Juniper J-series Services Router J2350 Hardware Manual

JUNOS Software with Enhanced Services Hardware Guide

Recovering Primary Boot Devices

All Services Routers use a compact flash to store JUNOS Enhanced Services, router
configuration files, and log files. The internal compact flash is not hot-swappable and
is accessible only after you remove the cover on the back panel of the router chassis.
In addition to the internal compact flash, J2320 and J2350 Services Routers have a
slot in the front of the chassis for external flash media. All Services Routers also
support externally pluggable USB storage devices. If the primary storage medium
becomes corrupted and no secondary medium is in place, you can reload the JUNOS
recovery software package onto the corrupted compact flash card with a desktop or
laptop computer running either a UNIX, Microsoft Windows 2000, or Windows XP
operating system.
This section contains the following topics:

Why Compact Flash Recovery Might Be Necessary

For media redundancy, we recommend that you keep a secondary storage medium
attached and updated at all times. Use the
perform the update. (For instructions, see the JUNOS Software Administration Guide.)
If the internal compact flash fails at startup, the Services Router automatically boots
itself from the external compact flash or USB storage device. When a redundant
storage medium is not available, the router is unable to boot and does not come
back online. This situation can occur if the power fails during a JUNOS Enhanced
Services upgrade and the physical or logical storage media on the router are corrupted.
If the primary storage medium becomes corrupted and no secondary medium is in
place, you can reload the JUNOS Enhanced Services image onto the corrupted compact
flash with a desktop or laptop computer running either a UNIX, Microsoft
Windows 2000, or Windows XP operating system.
CAUTION: This procedure does not recover any router configuration files. After you
reinstall JUNOS Enhanced Services, all the information on the original internal compact
flash is lost.

Recommended Recovery Hardware and Software

Before configuring compact flash recovery, assemble the equipment and software
listed in Table 48 on page 165.
164
Recovering Primary Boot Devices
Reboot the system? [y/n] y
Why Compact Flash Recovery Might Be Necessary on page 164
Recommended Recovery Hardware and Software on page 164
Configuring Internal Compact Flash Recovery on page 165
command to
request system snapshot