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.
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.