[Arm-netbook] Disecting mmcblk0p1 and the boot process
elendil at planet.nl
Sun Mar 14 19:53:42 GMT 2010
I think I may have found how they are flashing the root file system.
This is not yet verified.
There are two kernel images in the firmware tarball:
The first we know is the kernel copied to flash and what is booted during a
normal system boot.
The second is quite a bit larger. I suspect that it's a kernel with an
initramfs initrd piggybacked on top of it.
This initrd would then contain a simple Linux system that partitions the
flash, creates file systems on the 2nd and 3rd partition and extracts the
The really nice bit is that this same procedure should also work nicely for
Debian Installer. It means that I should be able to:
- boot D-I from external SD card using the flash boot procedure
- have the included initrd mount that external SD card and use that as the
source for additional components (udebs)
It also means the internal flash remains free during the installation and
can thus be partitioned and used as we like (excluding the first
"partition" which remains reserved for u-boot and kernel).
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