Android - can fastboot be used to backup device?
If you check with our fastboot tag-wiki, and follow up the link to the List of fastboot commands, you will see the answer is NO. Fastboot only has commands to write to the device. A few exceptions include:
- making sure there is a device at all, using
- some OEM specific commands to read configuration values (
fastboot oem <option>– note that all those, except for
oem unlock, options start with
- several bootloader specific commands
- rebooting the device after "work done" (
From the CyanogenMod Fastboot Intro, emphasis mine:
fastboot is a small tool that comes with the Android SDK (software developer kit) that can be used to re-flash partitions on your device. It is an alternative to the recovery mode for doing installations and updates.
Wikipedia describes fastboot as a diagnostic protocol included with the SDK package used primarily to modify the flash filesystem via a USB connection from host computer. (again, emphasis mine).
No source speaks about backing up partitions (or data) from the device.
We can temporarily load a custom recovery
fastboot boot <kernel> [<ramdisk>]
then backup system partitions