Howto make a 0xffff backup step by step, from
http://bloglon.blogspot.com/2011/01/...p-by-step.html

DOwnload "0xffff" v0.3.9 from
http://talk.maemo.org/showpost.php?p=654646&postcount=3
(in order to execute the file 0xFFFF.static, you must copy it to a folder in the main partition (Not FAT/FAT32))


cp 0xFFFF.static.gz /usr/local/sbin
cd /usr/local/sbin
gunzip 0xFFFF.static.gz
chmod +x 0xFFFF.static
mkdir /media/mmc2/mybackup0xfff
sudo ./0xFFFF.static -e /media/mmc2/mybackup0xfff/


Now you have some new files in /media/mmc2/mybackup0xfff/ (total 262MB)
config.bin
initfs.jffs2
rootfs.jffs2
secondary.bin
xloader.bin
zImage

you can put in one tar file.

tar -cf /media/mmc2/myN810backup.tar .
And I copied the file to my PC

Notes:
To extract the contents from the tar file
tar -xvf myN810backup.tar