WARNING: Improper use or installation of the image may harm your device. We do not take any responsibility of the damage that may be caused to your device.
This page contains instructions how to use the rescue initrd with the Nokia N900 device. This initrd contains some tools/functions that can be used e.g., to modify content of the external/internal memory cards.
Get the initrd and kernel images for the rescue process
mkdir n900-rescue-initrd cd n900-rescue-initrd wget http://repo.meego.com/MeeGo/builds/1.0.99/18.104.22.168.20101019.1/core/repos/armv7l/packages/armv7l/nokia-n900-rescue-initrd-0.1-2.157.armv7l.rpm wget http://repo.meego.com/MeeGo/builds/1.0.99/22.214.171.124.20101019.1/core/repos/armv7l/packages/armv7l/kernel-n900-126.96.36.199-10.3.armv7l.rpm
After this you need to extract the kernel and initrd files from the rpm packages
rpm2cpio nokia-n900-*.rpm | cpio -vid ./boot/initrd* rpm2cpio kernel-n900-*.rpm | cpio -vid ./boot/vmlinuz*
Now you have a ./boot/ directory in the current dir where the initrd and vmlinuz files are located.
NOTE: Here we do not flash the kernel or initrd to the device, but only load them to the device memory during the boot. Original images are restored when the device is restarted.
NOTE: Charge your battery before using initrd. Currently initrd is not able to charge the battery.
sudo flasher-3.5 -k boot/<vmlinuz-n900> -n boot/<initrd.img> -l -b"rootdelay=1 root=/dev/ram0"
Now the device boots and you can see a rescue menu.
With rescue menu you can:
When using USB storage mode the initrd mounts eMMC and the microSD card, if microSD card is available and backcover is attached (or magnet in place). Below is example what devices could be seen with
sudo fdisk -l
command after USB storage mode is enabled.
Disk /dev/sdX: 32.0 GB, 32015122432 bytes 4 heads, 16 sectors/track, 977024 cylinders Units = cylinders of 64 * 512 = 32768 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004cbd3 Device Boot Start End Blocks Id System /dev/sdX1 2 884865 28315648 c W95 FAT32 (LBA) /dev/sdX2 884866 950401 2097152 83 Linux /dev/sdX3 950402 974977 786432 82 Linux swap / Solaris Disk /dev/sdY: 7969 MB, 7969177600 bytes 4 heads, 32 sectors/track, 121600 cylinders Units = cylinders of 128 * 512 = 65536 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000b012c Device Boot Start End Blocks Id System /dev/sdY1 1 24415 1562500 83 Linux /dev/sdY2 24417 28320 249856 83 Linux
Here /dev/sdX/ is the 32.0 GB eMMC that contains the user home in Maemo 5 and the /dev/sdY is the 8 GB microSD cards used during this example. Be careful not to destroy your data in the eMMC device.