Paule Ecimovic wrote: > Hi, all > > Is it possible to boot from MMC (assuming one sets up this booting > option by cloning the 770 on a suitably-large MMC and installing the > alternate boot loader and all the rest) to recover from a bricking > flash? Boot from mmc can help you only when the problem is in rootfs partition i.e. (a bit simplistic explanation) when booting the device blue progressbar on the bottom starts. I'm not sure what you mean by 'bricking flash' but any device reflash with full firmware image removes modified initfs with boot menu and then you cannot boot from mmc at all (without reflashing modified initfs back). But this is not big problem because booting from mmc allows you to stop fixing problems with your device by reflashing. Instead of reflashing you can boot clean system and either mount broken system and fix it (if you know how) or save data from it and clone your clean system to mmc and start again. > Are there bricking scenarios from which it is not possible to > recover via booting from MMC? Definitely yes but most things that can normally go wrong happen in rootfs. Examples: - you install bad/incompatible package - you try apt-get upgrade - you are trying to hack startup sequence - device reboots in wrong moment and some system files get lost or become corrupted (yes this really happens sometimes if you are unlucky) Frantisek
