Update README.md

unbrick/README.md

@@ -2,19 +2,39 @@
 
 This procedure allows you to unbrick your cam using a backup file (which you did previously).
 
+Please note: bootloader saves the hash of the file and if it matches the hash of the file you are trying to load, this procedure will not work.
+
+In this case, you have to use a different file: for example you can use "factory" if you have previously used "hacked" and vice versa (see below).
+
+In the "hacked" version I added a random file to force the hash to change.
+
+
 ## How to use
 
 1. Clone this repo on a linux environment.
-2. Copy your home partition (mtdblock3.bin) in the folder corresponding to your model.
+2. Copy your partition (mtdblockX.bin) in the folder corresponding to your model. mtdblock2.bin for rootfs partition and mtdblock3.bin for home partition.
 3. Enter to the unbrick folder
    `cd unbrick`
-4. Run the build command to create the unbrick partition:
+4. Run the build command with the desired option.
+
+   If you want to create an original unbrick partition:
+
+   `./build.sh factory`
 
-   `./build.sh`
+   If you want to create a hacked partition:
 
-5. You will find the file home_XXX.gz in the folder corresponding to your model.
-6. Unzip it in the root folder of your cam.
-7. Switch on the cam and wait for the cam to come online.
+   `./build.sh hacked`
+
+   The last option allows you to run the hack after the unbrick (but you need to install the hack separately). The backup partition is already modified to run the hack.
+5. You will find the file home_XXX.gz (and/or rootfs_XXX.gz) in the folder corresponding to your model.
+6. Check if there were any errors in the procedure: the size of the resulting file must be similar to the corresponding mtdblockX.bin.
+7. Unzip it in the root folder of your sd card.
+8. Switch on the cam and wait for the cam to come online.
+
+To run this script correctly you have to comply some dependencies depending on your OS.
+For example if you are using a Debian distro, install:
+- mtd-utils
+- u-boot-tools
 
 ## DISCLAIMER
 **NOBODY BUT YOU IS RESPONSIBLE FOR ANY USE OR DAMAGE THIS SOFTWARE MAY CAUSE. THIS IS INTENDED FOR EDUCATIONAL PURPOSES ONLY. USE AT YOUR OWN RISK.**