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I've got some embedded system running Android. Before I start compiling anything for it I'd like to do full backup and then have possibility to restore it. The only way of backup everything I know is to use:

dd if=/dev/block/mmcblk0 of=/dev/block/mmcblk1

but how to restore it when something went wrong and system is not running? Is it possible to burn back this image to Android system - for example using fastboot? I've got development board with Qualcomm MSM8909.

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Yes, it's possible. You can restore all partitions grabbed by dd like this:

fastboot -w flashall

Or write separate partitions by

fastboot flash boot

fastboot flash recovery

fastboot flash userdata

Prior to that your should put your partitions to the same directory where you run fastboot. Separate partitions can be obtained by simple unpack of the image got from your dd command.

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