Boot Options
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Basic System Configuration Guide
3HE 11010 AAAC TQZZA Edition: 01
5.3 Boot Loader File Protection
Nokia recommends that the boot loader file on all 7705 SAR platforms be upgraded
using a specific command. This command is mandatory on all 7705 SAR platforms
that do not have a removable compact flash drive and is part of a mechanism that
protects the boot loader file from accidental overwrites on these platforms.
The command checks that the new boot.ldr file is a valid image and that it is at least
a minimum supported variant for the hardware platform on which it is being loaded.
Once this has been verified, the command overwrites the boot.ldr file that is stored
on the system.
5.3.1 Before Upgrading
Before starting the upgrade, all 7705 SAR image files must be copied to the cf3:
device on the system. Nokia recommends copying all the image files for a given
release into an appropriately named subdirectory off the root directory; for example,
cf3:\7705-TiMoS-R6.1.R2. Copying the boot.ldr and other files in a given release to
a separate subdirectory ensures that all files for that release are available in case it
is necessary to downgrade the software version.
5.3.2 Performing the Upgrade
Upgrade the boot loader file using the command admin>update boot-loader
source_url, where the source URL specifies the new boot.ldr filename and its
location; for example, in the format cf3:\sub_directory\boot.ldr.
Note: On systems that do not have removable flash drives, you cannot overwrite the
boot.ldr file in the root directory on cf3:. Instead, copy the file into a subdirectory, or allow
the update boot-loader command to obtain the file from a network address. Nokia strongly
recommends following this process for all 7705 SAR systems.
Warning: The file upgrade command takes several minutes to complete. Do not reset or
power down the system, or insert or remove cards or modules, while the upgrade is in
progress, as this could render the system inoperable.
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