Booting from a flash card

This article covers the steps you need to follow to boot from a flash card. The process is somewhat involved, so some familiarity with the command line is recommended.

Why would we want to boot from a flash card?

 * For more space to install applications.
 * An easy-to-user bootable backup.
 * To improve performance (note, this is dependent on the quality of your flash card).

Gain root access
First of all you need to be able to gain root access.

Partition your card
Follow the instructions to partition your card.

Install bootmenu
Connect your device to the charger, as running out of battery power during the flashing process could damage the device.

Preparation
First, we need to install wget, so open Xterm and, as root, run:

apt-get install wget

Then run:

mkdir /home/user/local/bin cd /home/user/local/bin wget http://www.nmacleod.com/nokia/bin/nupgrade.sh wget http://www.nmacleod.com/nokia/bin/tar chmod +x nupgrade.sh tar

Now we need to download and install fanoush's initfs flasher, so, as root, run:

(Note, although putting the initfs_flasher is the directory given is not required, it cannot be placed on a FAT partition (i.e., one of the cards).

cd /home/user/local/bin wget http://fanoush.wz.cz/maemo/initfs_flasher.tgz tar zxvf initfs_flasher.tgz cd /home/user/local/bin/initfs_flasher/

Configuration
This is an optional step, but if you want to customize the bootmenu to properly reflect your partitioning setup, change the partition labels, and a number of other options, then you'll need to rename the appropriate  file to   and edit it to your liking. The README included with flasher and the comments in the configuration file should be enough to tell you what everything is.

The flasher will ask you if you want to include your bootmenu.conf file if you renamed it properly.

Flash the initfs
cd /home/user/local/bin/initfs_flasher/ ./initfs_flash

Follow the onscreen instructions. You can answer yes to all of these questions if you don't understand what they mean.

Now we need to load the kernel modules for ext2, so, as root, run:

insmod /mnt/initfs/lib/modules/$(uname -r)/mbcache.ko insmod /mnt/initfs/lib/modules/$(uname -r)/ext2.ko

Clone to the card
Many thanks to milhouse for writing and maintaining this script.

Now it's time to clone your install over to partition 2 of the internal card. The script works in stages to allow better control and error detection, and should take about 10 minutes to complete:
 * 0 - Create ext2 filesystem on partition 2 of the Internal memory card
 * 1 - Mount partition 2 as /opt
 * 2 - Mount rootfs as /floppy
 * 3 - Perform cloning process
 * 4 - Commit filesystem updates and unmount /floppy and /opt

So, as root, run:

cd /home/user/local/bin ./nupgrade.sh 0 ./nupgrade.sh 1 ./nupgrade.sh 2 ./nupgrade.sh 3 ./nupgrade.sh 4 reboot

Your device will reboot when done, and you can select the partition you want to boot from from the bootmenu.

Remove the menu
If you decide you do not wish to see the bootmenu any longer, you can uninstall it by either reflashing the whole OS image, or just flashing the initfs (in Linux and OS X) by running:

sudo ./flasher-3.0 -F  --flash-only=initfs -R