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inbox:firmware_image_names

Firmware image names

If you are confused by the many different firmware types and extensions in the LEDE firmware downloads table, read on, this pages tries to explain a bit about this topic.

You can help to improve this page by adding explanations for the different firmware types below.
See also imageformats and merge both pages into one.

Firmware types

Target Install Upgrade
adm5120 squashfs.bin squashfs.bin
apm821xx squashfs-factory.img
initramfs-kernel.bin
squashfs-sysupgrade.tar
ext4-rootfs.img.gz
ar7 squashfs.bin
squashfs-code.bin
squashfs.bin
ar71xx factory.img
factory.bin
sysupgrade.bin
at91
atheros squashfs-factory.bin squashfs-sysupgrade.tar
brcm2708 ext4-sdcard.img.gz -
brcm47xx squashfs.bin
squashfs.chk
squashfs.trx
squashfs.bin
squashfs.chk
squashfs.trx
bcm53xx squashfs.bin
squashfs.chk
squashfs.trx

squashfs.chk
squashfs.trx
brcm63xx squashfs-cfe.bin
squashfs-factory.chk
squashfs-sysupgrade.bin
cns3xxx - sysupgrade.bin
imx6 ? ?
ipq806x factory.img sysupgrade.tar
ixp4xx squashfs.bin
squashfs.img
zImage
squashfs-sysupgrade.bin
kirkwood squashfs-factory.bin squashfs-sysupgrade.bin
lantiq initramfs-kernel.bin
squashfs-factory.bin
squashfs-sysupgrade.bin
layerscape squashfs-firmware.bin -
mpc85xx squashfs-factory.bin squashfs-sysupgrade.bin
mvebu sdcard.img.gz
squashfs-factory.img

squashfs-sysupgrade.bin
mxs ? ?
orion not supported not supported
oxnas squashfs-ubinized.bin
ubifs-ubinized.bin
squashfs-sysupgrade.tar
ubifs-sysupgrade.tar
ramips initramfs-kernel.bin
squashfs-factory.bin
squashfs-factory.dlf
initramfs-uImage.bin
squashfs-sysupgrade.bin
squashfs-sysupgrade.tar
sunxi ext4-sdcard.img.gz
squashfs-sdcard.img.gz
x86 combined-ext4.img.gz -

Explanations

factory.img/.bin

initramfs

An initramfs and initrd are basically the same. It’s a filesystem in memory, which contains userland software. In an embedded environment it might contain the whole distro, on bigger systems it can contain tools&scripts to assemble&mount raid arrays and stuff like that before passing userland boot to them. Both can have a uHeader, to let uBoot know what it is.

initramfs-uImage.bin

initramfs-kernel.bin

sdcard.img.gz

sysupgrade / factory

There are basically two potential reasons why only a sysupgrade image is available for your router, either the router is already running some kind of OpenWrt fork (which understands the sysupgrade format natively) or there simply is no known way to assemble a factory image accepted by the router.
Source: https://forum.lede-project.org/t/install-lede-on-sitecom-wlr-8100/3304/2

sysupgrade.bin/.tar

squashfs.bin/.chk/.trx

ubinized.bin

uImage

uImage is (in most cases) a zImage with a 64 byte uImage header, which contains the load address & entry point of the zImage, so that uBoot knows what to do with it. Further is contains a description of the actual contents (linux kernel, version, …)

zImage

zImage is a compressed plain kernel with a ‘pyggyback’. Some extra code which can decompress the kernel before booting it.

inbox/firmware_image_names.txt · Last modified: 2018/06/01 08:53 by tmomas