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This allows us to use the full size of nand, which extends ubi size from 64Mb to 122.25Mb. If you are at factory firmware, please refer to [PR](https://github.com/openwrt/openwrt/pull/21141) to boot into OpenWrt first. 1. Log in to the device and backup all the partitions, especially unique `Factory` and `bdata` partitions from System -> Backup / Flash Firmware -> Save mtdblock contents. 2. Install kmod-mtd-rw to unlock mtd partitions for writing: ```bash apk update && apk add kmod-mtd-rw && insmod mtd-rw i_want_a_brick=1 ``` 3. Write new OpenWrt (U-Boot Layout) `BL2` and `FIP`: ```bash mtd write openwrt-mediatek-filogic-cudy_wbr3000uax-v1-ubootmod-preloader.bin BL2 mtd write openwrt-mediatek-filogic-cudy_wbr3000uax-v1-ubootmod-bl31-uboot.fip FIP ``` 4. Set static IP on your PC: `192.168.1.254`, gateway `192.168.1.1` 5. Serve openwrt-mediatek-filogic-cudy_wbr3000uax-v1-ubootmod-initramfs-recovery.itb using TFTP server. 6. Connect Router LAN with PC LAN. 7. Cut off the power and re-engage, wait for TFTP recovery to complete. 8. After OpenWrt initramfs recovery has booted, clean `/dev/mtd5` ubi partition to utilize maximum of free space & create ubootenvs: ```bash ubidetach -p /dev/mtd5; ubiformat /dev/mtd5 -y; ubiattach -p /dev/mtd5 ubimkvol /dev/ubi0 -n 0 -N ubootenv -s 128KiB ubimkvol /dev/ubi0 -n 1 -N ubootenv2 -s 128KiB ``` 4. Perform sysupgrade. Tested-by: 4pda users Signed-off-by: Fil Dunsky <filipp.dunsky@gmail.com> Link: https://github.com/openwrt/openwrt/pull/21225 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> |
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