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The only requirement ONIE has for the NOS installer is that the NOS must update the is entirely up to the NOS vendor, but generally it will contain commands to load and boot the NOS image from NOR flash, an SD card or embedded USB drive.
See the NOS Installer section for more about the NOS installer interface.
It is generally used in the single copy approach, running in a initrd (recipes are provided to generate with Yocto).
However, it is possible to use it in a double-copy approach by use of Software collections.
To invoke the install operation, the running NOS sets the See the Reinstalling or Installing a Different NOS section for more about the NOS reinstaller interface.
U-Boot 2016.01 (Apr 30 2016 - 0900) DRAM: 896 Mi B HW Revision: 1 MMC: NEXELL DWMMC: 0, NEXELL DWMMC: 1 In: serial Out: serial Err: serial Net: eth0: [email protected] Hit any key to stop autoboot: 0 ARTIK5# The U-Boot environment is a block of memory that is kept in persistent storage and copied to RAM when U-Boot starts. At times we see CRC check sum fails on the updated image.Once we update the boot args to the correct image size issue gets resolved.Please see here for a starting point: When auto-update support over TFTP is enabled, U-Boot will test in the initialization sequence if a specific image file is present on the TFTP server.If this is the case, the image will be downloaded and, if it is considered ok, installed into flash.