Dear Advanced Users. Could please share Kindle DX graphite Us version partition

[stranger_st]

Dear Advanced Users. Could please share Kindle DX graphite Us version partition. I have bricked my kindle while some experiments and now cannot fix it. I already have serial connection and password now just need dump.
Here is the way of taking dump:

You need usb Network connection for that.
If I am not wrong
scripts to run in console:
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/etc/init.d/powerd stop
dd if=/dev/mmcblk0p1 of=/mnt/us/rootfsbackup.bin bs=1024
tar -cf /mnt/us/rootfsbackup.tar /mnt/us/rootfs.bin
/etc/init.d/powerd start
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I need this rootfsbackup.tar file which will be in the Kindle memory, It may be found in the drive when kindle connected as USB.

Hope somebody can help me.