Originally Posted by geekmaster
The serial cable connection gives you more options that are built-in. You can export and flash partitions using the ymodem protocol. Using USB-only requires using software tools that we are still creating and learning how to use. At this time the most reliable way (if your kindle is not TOO bricked) is to boot to diags and repair your kindle by putting the commands you need in a RUNME.sh script). You can write a backup copy to the main system boot partition with:
dd if=/mnt/us/mmcblk0p1.img of=/dev/mmcblk0p1 bs=1024
This has been documented multiple times in this and other threads.
You may want to change bs=1024 to bs=1M to speed up the write, but I have not yet verified that the version of dd in the kindle supports the "1M" size (not all version do).
I have backups of mmcblk0p1 and mmcblk0p2.
But my Kindle does not boot in main, diags or fastboot(?) modes.
Right now I'm charging it to try fastboot again.
So right now I'm choosing between buying new Kindle, serial cable (but I don't know where) or just waiting for you to solve this (but I don't know how long).
So most likely I will buy new one and just enjoy reading