- Nov 8, 2011
- 3,836
- 1,394
If you have a AMLogic, make and upload your dumps, In the coming weeks I will start modify uploaded recovery.img for these devices so they can be used to recovery the tablet, testers will be needed as I don't have all of these type of tablets, I am hoping one method will cover them all, this is going to be via sdcard.
Aditya Gilra: Unbricking & Upgrading the Gadmei E8HD
Please read and understand above link,
Before you do anything, tablet needs to be rooted.
adb shell
cat /proc/mtd
post outpout include device name eg 7065
to dump tablet
adb shell
su
mkdir /sdcard/dump
cat /dev/mtd/mtd4 > /sdcard/dump/boot.img
cat /dev/mtd/mtd3 > /sdcard/dump/recovery.img
cat /dev/mtd/mtd0 > /sdcard/dump/bootloader.img
busybox tar -czvf /sdcard/dump/coby33_system.tgz /system
#note change to your device.
#note also check your cat /proc/mtd output and adjust backup commands to your tablet if different than mine.
if you have a problem with making system backup you will need to replace busybox.
The goal here is to get these tablets to boot from sdcard.
In the above blog it states this sudo dd if=u-boot.bin of=/dev/sdb
It has came to my attention some users don't know where or what u-boot.bin is, this is just your bootloader.img
so you can rename bootloader.img to u-boot.bin, or change the command to sudo dd if=bootloader.img of=/dev/sdb
Scripts I use to unpack boot.img and recovery.img for 7065
7065 boot/recovery unpack scripts
to flash recovery.img
download
flash_image
Aditya Gilra: Unbricking & Upgrading the Gadmei E8HD
Please read and understand above link,
Before you do anything, tablet needs to be rooted.
adb shell
cat /proc/mtd
post outpout include device name eg 7065
to dump tablet
adb shell
su
mkdir /sdcard/dump
cat /dev/mtd/mtd4 > /sdcard/dump/boot.img
cat /dev/mtd/mtd3 > /sdcard/dump/recovery.img
cat /dev/mtd/mtd0 > /sdcard/dump/bootloader.img
busybox tar -czvf /sdcard/dump/coby33_system.tgz /system
#note change to your device.
#note also check your cat /proc/mtd output and adjust backup commands to your tablet if different than mine.
if you have a problem with making system backup you will need to replace busybox.
The goal here is to get these tablets to boot from sdcard.
In the above blog it states this sudo dd if=u-boot.bin of=/dev/sdb
It has came to my attention some users don't know where or what u-boot.bin is, this is just your bootloader.img
so you can rename bootloader.img to u-boot.bin, or change the command to sudo dd if=bootloader.img of=/dev/sdb
Scripts I use to unpack boot.img and recovery.img for 7065
7065 boot/recovery unpack scripts
to flash recovery.img
download
flash_image
Code:
adb push flash_image /data/local/tmp/flash_image
adb push recovery.img /data/local/tmp/recovery.img
adb shell
su
chmod 755 /data/local/tmp/flash_image
/data/local/tmp/flash_image recovery /data/local/tmp/recovery.img
reboot recovery
Last edited: