NSA310S u-boot installation - cannot boot (1 reply)

Dear bodhi,

thank you very much for offering these pieces of software combined with a nice little manual how to install it.
Since my Laptop died on Sunday and yesterday my desktops data-HDD crashed I needed a cheap and quick solution for all my data and got an old zyxel NSA310s.
Unfortunately, beeing kind of a novice to linux and especially to flashing hardware via UART, I seem to have inadvertently bricked my zyxel. :-(
My goal was to flash the uboot to nand but after rebooting between section A and B of your instructions the device is stucked in a bootloop. I'm monitoring it via UART.

Before rebooting I backed up the settings as follows:

fw_env.config

# MTD device name       Device offset   Env. size       Flash sector size       Number of sectors
# NAND example
/dev/mtd1               0x0000          0x20000         0x20000                 4

/proc/mtd

dev:    size   erasesize  name
mtd0: 00100000 00020000 "uboot"
mtd1: 00080000 00020000 "uboot_env"
mtd2: 00080000 00020000 "key_store"
mtd3: 00080000 00020000 "info"
mtd4: 00a00000 00020000 "etc"
mtd5: 00a00000 00020000 "kernel_1"
mtd6: 02fc0000 00020000 "rootfs1"
mtd7: 00a00000 00020000 "kernel_2"
mtd8: 02fc0000 00020000 "rootfs2"

fw_printenv did not change at all

bootargs=console=ttyS0,115200 mtdparts=nand_mtd:0x100000(uboot),0x80000(uboot_env),0x80000(key_store),0x80000(info),0xA00000(etc),0xA00000(kernel_1),0x2FC0000(rootfs1),0xA00000(kernel_2),0x2FC0000(rootfs2) root=/dev/nfs rw init=/init
bootcmd=nand read.e 0x2000000 $(kernel_addr) 0xA00000; bootm 0x2000000
bootdelay=2
baudrate=115200
loads_echo=0
ipaddr=10.4.52.165
serverip=10.4.52.7
rootpath=/srv/ubuntu
netmask=255.255.255.0
nandEcc=1bit
kernel_addr=C80000
MODEL_ID=AD03
PRODUCT_NAME=STG-315
FEATURE_BIT=00
CONTRY_TYPE=FF
VENDOR_NAME=MitraStar Technology Corp.
run_diag=yes
ethaddr=5C:F4:AB:2F:FB:F0

Bad blocks as of / # dmesg | grep -i 'bad' were:

Scanning device for bad blocks
Bad eraseblock 100 at 0x000000c80000
Bad eraseblock 200 at 0x000001900000

After rebooting i got the following messages repeatingly:

U-Boot 2016.05-tld-1 (Jun 12 2016 - 13:55:45 -0700)
ZyXEL NSA310S/320S 1/2-Bay Power Media Server

SoC:   Kirkwood 88F6702_A1
DRAM:  256 MiB
WARNING: Caches not enabled
NAND:  128 MiB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   egiga0
MV88E1318 PHY initialized on egiga0
Hit any key to stop autoboot:  0
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 3 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found

Partition Map for USB device 0  --   Partition Type: DOS

Part    Start Sector    Num Sectors     UUID            Type
  1     2048            15644672        00000000-01     83 Boot
loading envs from usb 0 ...
** File not found /boot/uEnv.txt **
** File not found /boot/uImage **
** File not found /boot/uInitrd **
Wrong Image Format for bootm command
Error occured, error code = 112
ERROR: can't get kernel image!
stopping USB..

Reset IDE: Bus 0: OK Bus 1: not available
  Device 0: Model: ST8000AS0002-1NA17Z  Firm: AR13 Ser#: Z84048X9
            Type: Hard Disk
            Supports 48-bit addressing
            Capacity: 7630885.3 MB = 7452.0 GB (15628053168 x 512)
** File not found /boot/uImage **
** File not found /boot/uInitrd **
Wrong Image Format for bootm command
Error occured, error code = 112
ERROR: can't get kernel image!
resetting ...

what was my mistake (aside from touching the firmware in the first place...) and what can i do now?
Help is much appreciated!

-Hendrik