====== Recovering from a bad firmware ======


===== Using a serial console =====
At this very moment the only way to fix bricked DSM-G600 is to use a serial console.

  - [[howto:serial_connector|Install a serial console]].
  - Now you should see which part of your firmware is failing.<code>U-Boot 0.2.0 (May 11 2005 - 18:56:16)

CPU:   MPC8245 V1.2 at 170.503 MHz:
Board: Sandpoint 8245
DRAM:  32 MB
FLASH: FUJI_DL323BE
In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0
## Booting image at fff10000 ...
   Image Name:   Linux-2.4.21-pre4
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    853695 Bytes = 833.7 kB
   Load Address: 00000000
   Entry Point:  00000000
 Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at ffc20000 ...
   Image Name:   default
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    3072965 Bytes =  2.9 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... Bad Data CRC
*</code> Here we have a failing ram disk image.
  - Get firmware you want to flash. I suggest you to use D-Link original unmodified firmware!
  - Get program to unpack firmware image. It is located in [[http://dns323.kood.org/downloads/people/beattie/Build_DSM-0.3.tgz|this]] archive in fwbuild-0.x.tgz file. Use ''fwdump firmware-image''. Now you have 3 files: firmware.sec1 which is u-boot formated kernel image, firmware.sec2 is u-boot formated ram disk image and firmware.sec3 you do not need.
  - And finally [[howto:kernel_upload|here is a how to upload]] a needed or failing image using a serial console.