I had many free space on device.
I load initfs_flasher.tgz from post #204, unpacked its and run ./initfs_flash script. Say yes for backup, free space, ssh and after them scipt terminate abnormaly with errors.
After them I copy mkfs.jffs2 from previos initfs_flasher.tgz and rerun ./initfs_flash.

When script successful ended I reboot N800 by press enter
Tablet not loaded, freezed on "NOKIA" screen