Kernel + root fs to boot with fastboot

[Wendy208]

Hello,
I accidently deleted some files and I’m trying to get it back. So now I’m looking for a kernel image (that can be booted with fastboot on a FP2) and if someone has one also a romdisk.

Also pointers on where to find or how to build. I would appreciate it, thanks.
My plan is to do a copy (with dd) of the flash and then use some recovery tools to find my files back.
Wendy

[AnotherElk]

You can boot TWRP via fastboot without installing it, and you can dd stuff with the built-in terminal in TWRP … but I’m only guessing based on some keywords from your post, sorry.

FP2 How to use TWRP without flashing it (e.g. for Backup)

I already posted it here, but I’m pretty sure many people aren’t aware of this I found a way to boot TWRP without flashing it, so you only boot it from your computer, do what you want and as soon as you shutdown your phone, it’s just as it was before. TWRP is a great tool for many things (install updates, perform a factory reset, create or restore a (full) backup, copy files between PC and FP2, …) It’s pretty simple to do this, the hardest thing may be getting fastboot …

[Wendy208]

Thanks for the tip, it seems to work (its copying now)

This is how to do it:

• wget https://fp2.retsifp.de/signed-recovery/twrp-3.2.1-0-FP2-signed.img
• fastboot boot twrp-3.2.1-0-FP2-signed.img
• adb shell dd if=/dev/block/mmcblk0p20 bs=19999 | dd bs=19999 of=p20.img