Does this have any particular advantage over using mkfs.jffs2 to create a jffs2 image of your rootfs? For creating the image, see the first half of this post: http://talk.maemo.org/showthread.php?p=33348#post33348 .

There are various ways of restoring the jffs2 image to the nand flash. Fanoush's suggested method (in the second half of the post linked above) does not require a PC, but does require a bootable rootfs somewhere on mmc. You could clone a pristine rootfs to an mmc partition specifically for this purpose (and not use it for anything else).

Alternatively, you could copy the jffs2 image to PC (it's a good idea to tar it first) and restore it with the 0xFFFF flasher. If you don't have a Linux PC handy but you do have another Maemo device, you could use the other Maemo device in USB host mode as the “PC”, and flash the image using 0xFFFF.static .

The various scripts involved (mkfs.jffs2, sumtool, flash_eraseall and nandwrite) are bundled into Fanoush's initfs_flasher folder, and you can still get a .tgz of it from http://fanoush.wz.cz/maemo/ .

0xFFFF flasher is obtainable from http://www.nopcode.org/0xFFFF/ .

You can find a link for 0xFFFF.static in this post: http://talk.maemo.org/showpost.php?p=741534&postcount=2 .

P.S. Although Fanoush says he creates the jffs2 image while booted into mmc, you can do it equally well on the internal flash. However, restoration can not be done on internal flash, since everything there is erased when you run the flash_eraseall script (hence the name).