Flashing the eMMC in the N900
When flashing the eMMC content, the safe way is flash the eMMC/VANILLA image first, then remove battery for a moment, and then flash the FIASCO/Rootfs image. Do not boot up the device between the two i.e do NOT use the -R parameter at the end! Rationale: on accidental booting in between the 2 flash processes, the sequence formerly suggested (rootfs first) will result in a broken system. The sequence "eMMC first, then rootfs" is checked back with Nokia affiliates and is proven to work. The former advice on tablets-dev.nokia.com was not based on any facts for the recent eMMC VANILLA image. It's fixed now and in line with this wiki
Note that flashing eMMC will delete the /opt directory, so you *always* need to reflash your rootfs (the COMBINED image) after flashing eMMC (VANILLA img)
Источник: https://wiki.maemo.org/Updating_the_tab … e#Option_1