Booting from a flash card

Revision as of 03:52, 25 August 2008

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.

Advanced users may wish to read advanced booting as well, for more advanced booting-related configuration and setup information.

1 Why would we want to boot from a flash card?
2 Gain root access
3 Partition your card
4 Install the necessary tools
5 Install bootmenu
- 5.1 Configuration
- 5.2 Flash the initfs
6 Clone to the card
7 Remove the menu
8 Advance booting

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 the necessary tools

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

apt-get install wget

Then run:

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

Then, to install the proper filesystem tools, run:

apt-get install e2fsprogs

Install bootmenu

Now we need to download and install fanoush's initfs flasher, so, as root, run:
Note, although putting initfs_flasher in the directory given is not required, it cannot be placed on a FAT partition (i.e., one of the cards).

cd /home/user/bin
wget http://fanoush.wz.cz/maemo/initfs_flasher.tgz
tar zxvf initfs_flasher.tgz
cd /home/user/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 bootmenu.conf.device.example file to bootmenu.conf 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.

When done, use this to set the default, xterm sudo gainroot chroot /mnt/initfs cal-tool --set-root-device ask:mmc2 #pick your own choice

mmc2 is partition 2 on internal
mmc3 is partition 3 on internal
mmc12 is partition 2 on external
mmc13 is partition 3 on external
flash is internal flash

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 <FIASCO image> --flash-only=initfs -R

Advance booting

For more advanced configuration and setup information for booting-related stuff, please see advanced booting.

Retrieved from "http://wiki.maemo.org/Booting_from_a_flash_card"

Category: Users

Personal tools

Navigation

Views