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rb411_u6

Day 6

More than a week and a lot of reading, why ment-to-direct-install packages are not included to my ramdisk, I started a new attempt for flashing the device. After reading this explizit documentation, recognized, that the RB411 differs from the “old” boards: It has a hard- and a fortconfig area and other numbers for the root device. This seems to be the reason, why the normal wget2nand does not work:

root@OpenWrt:/tmp# cat /proc/mtd
dev:    size   erasesize  name
mtd0: 0000b000 00001000 "routerboot"
mtd1: 00001000 00001000 "hard_config"
mtd2: 00002000 00001000 "bios"
mtd3: 00001000 00001000 "soft_config"
mtd4: 00040000 00004000 "booter"
mtd5: 005c0000 00004000 "kernel"
mtd6: 03a00000 00004000 "rootfs"

But with this information, I can now go on..

After alot of punishment with out-of-memory dumps, I realized severall things:

  1. You might unpack the tar.gz file with
    gzip -d openwrt-ar71xx-nand-rootfs.tar.gz
  2. Download the file directly to the mounted yaffs partition- you might not have enough ram for storing it there
  3. The all in one image is too large for unpacking on the RB411 ..

I created an extra small image for booting into the ram (I know, you can make it alot smaller). I used this configuration: small_config.zip After booting with this image, the rb has enough ram left for unpacking the whole image for the image posted on the last reports… (After I finished, I'll sum everything up to one page):

Things to do on your helper-system: Make sure, you have the following files:

openwrt-ar71xx-nand-vmlinux-initramfs.elf  <- Bootloader Image
openwrt-ar71xx-nand-rootfs.tar.gz    <- Large Image with all packages built in
openwrt-ar71xx-nand-vmlinux.elf   <- Kernel Image from the full-image build
# gzip -d openwrt-ar71xx-nand-rootfs.tar.gz
# python -m SimpleHTTPSever 80

Things to do on the router

# ifconfig br-lan:0 192.168.0.5  netmask 255.255.255.0 up
# mount /dev/mtdblock6 /mnt
# cd /mnt
# wget http://192.168.0.1/openwrt-ar71xx-nand-rootfs.tar
# tar xvf openwrt-ar71xx-nand-rootfs.tar -C ./
# rm openwrt-ar71xx-nand-rootfs.tar
# cd .. 
# umount /mnt

Now the root-partition is installed and we have to put the kernel on the kernel partition. In my case it is /mnt/mtd5

# mount /dev/mtdblock5 /mnt
# cd /mnt
# wget http://192.168.0.1/openwrt-ar71xx-nand-vmlinux.elf

It works theoretically… but in fact it does not load the kernel this way. But I found at PDF, that the kernel images must be named “kernel”…

# mount /dev/mtdblock5 /mnt
# cd /mnt
# mv openwrt-ar71xx-nand-vmlinux.elf kernel

Well done… know the router boots from its NAND-Flash :-P


By the way: I haven't find out, why my packages are not packed into the ram-loadable image .. but it seems, they where not included because of memory reasons… And I CAN'T beleive, that 32MB Memory is not enough for unpacking a 20Mb image.

rb411_u6.txt · Last modified: 2011/06/03 00:00 (external edit)