The nandg recovery image is much the same as the boot image but will boot into recovery which is a minimal boot envoirnoment. You can connnect with adb but no shell access or shell commands.

In [1]:

# The partition size of the image in bytes

!du tablet/nandg.recovery.img

32772	tablet/nandg.recovery.img

In [2]:

# We can use file to find out what kind of image we have.

!file tablet/nandg.recovery.img

tablet/nandg.recovery.img: Android bootimg, kernel (0x40008000), ramdisk (0x41000000), page size: 2048, cmdline (console=ttyS0,115200 rw init=/init loglevel=4)

In [3]:

# We can unpack this type of image file using one of the tools from the android sdk

!tools/unpackbootimg -i tablet/nandg.recovery.img -o tablet/recovery

BOARD_KERNEL_CMDLINE console=ttyS0,115200 rw init=/init loglevel=4
BOARD_KERNEL_BASE 40000000
BOARD_PAGE_SIZE 2048

In [4]:

# And this is what we get from unpacking this image file

!ls -lgG tablet/recovery/

total 12958
drwxrwxrwx 1    4096 Mar 17 09:36 img-ramdisk
-rwxrwxrwx 1       9 Mar 17 09:37 nandg.recovery.img-base
-rwxrwxrwx 1      46 Mar 17 09:37 nandg.recovery.img-cmdline
-rwxrwxrwx 1       5 Mar 17 09:37 nandg.recovery.img-pagesize
-rwxrwxrwx 1 5623172 Mar 17 09:37 nandg.recovery.img-ramdisk.gz
-rwxrwxrwx 1 7637412 Mar 17 09:37 nandg.recovery.img-zImage
-rwxrwxrwx 1      66 Mar 16 13:57 README.md

In [5]:

%%bash
# Lets unpack the ramdisk file

cd tablet/recovery/img-ramdisk/
gunzip -c ../nandg.recovery.img-ramdisk.gz | cpio -i

27247 blocks

In [7]:

# And what we have here

!ls -lgG tablet/recovery/img-ramdisk/

total 12837
-rwxrwxrwx 1  425152 Mar 17 09:37 aw5306_ts.ko
drwxrwxrwx 1       0 Mar 16 12:46 data
-rwxrwxrwx 1    2779 Mar 17 09:37 default.prop
drwxrwxrwx 1       0 Mar 16 12:46 dev
-rwxrwxrwx 1 5513161 Mar 17 09:37 disp.ko
drwxrwxrwx 1       0 Mar 17 09:37 etc
-rwxrwxrwx 1     851 Mar 17 09:37 fstab.sun8i
-rwxrwxrwx 1  360865 Mar 17 09:37 ft5x_ts.ko
-rwxrwxrwx 1  515908 Mar 17 09:37 gslX680.ko
-rwxrwxrwx 1  258952 Mar 17 09:37 gslX680new.ko
-rwxrwxrwx 1  338644 Mar 17 09:37 gt818_ts.ko
-rwxrwxrwx 1  137966 Mar 17 09:37 gt82x.ko
-rwxrwxrwx 1  439901 Mar 17 09:37 gt9xxf_ts.ko
-rwxrwxrwx 1  400708 Mar 17 09:37 gt9xx_ts.ko
-rwxrwxrwx 1  113536 Mar 17 09:37 init
-rwxrwxrwx 1 2457600 Mar 17 09:37 initlogo.rle
-rwxrwxrwx 1    1514 Mar 17 09:37 init.rc
-rwxrwxrwx 1  451089 Mar 17 09:37 lcd.ko
-rwxrwxrwx 1 1453290 Mar 17 09:37 nand.ko
drwxrwxrwx 1       0 Mar 16 12:46 proc
-rwxrwxrwx 1      58 Mar 16 13:58 README.md
drwxrwxrwx 1     240 Mar 17 09:37 res
drwxrwxrwx 1     448 Mar 17 09:37 sbin
-rwxrwxrwx 1   87947 Mar 17 09:37 sunxi-keyboard.ko
-rwxrwxrwx 1  143408 Mar 17 09:37 sw-device.ko
drwxrwxrwx 1       0 Mar 16 12:46 sys
drwxrwxrwx 1       0 Mar 16 12:46 system
drwxrwxrwx 1       0 Mar 16 12:46 tmp
-rwxrwxrwx 1     272 Mar 17 09:37 ueventd.goldfish.rc
-rwxrwxrwx 1    4024 Mar 17 09:37 ueventd.rc
-rwxrwxrwx 1     995 Mar 17 09:37 ueventd.sun8i.rc