[Angstrom-devel] [RFC] How best to handle root-on-flash vs root-on-SD images

[Marcin Juszkiewicz]

Dnia środa, 18 kwietnia 2007, Hans Henry von Tresckow napisał:
> Since it looks like the lowly collie is now joining the rank of 2.6
> kernel powered machines, it looks like there will be a few more
> "flash-challanged" machines in Angstrom. Currently we have the Collie
> (16MB) and the Poodle/C-700 (21MB Root). 

Also Tosa has 21-23M rootfs.

> From my testing so far, it seems that booting these kinds of machines
> with the root fs on SD is a very usefull option. However, it would be
> nice if we could offer some kind of "rescue" image that can be flashed
> into the internal root space to help with recovery and maintainace
> issues.

You need to look how nslu2 guys use their devices. NSLU2 has 8MB flash 
with kernel and base system. Boot from flash check does USB storage is 
present and working and then pivot_root into it. If storage is broken 
then user can login into flash rootfs and fix.

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