Thursday, October 25, 2012

Restore Nook Color to stock or root it with CM7

This document has the instructions to restore the Nook Color (NC) to stock or to root the NC with CM7.

I rooted the NC with CM9 but the performance was not good, so I recommend rooting the NC with CM7. Before rooting or restoring the NC you need to download several files, install some programs and create a bootable SD card.

What do you need?

  1. If you are in Windows:
  2. If you are in Mac OS X:
    • RAR Expander
  3. Clockwork (CWM) image for the size of your SD card, for example: 8gb_clockwork-3.2.0.1.rar. Go to http://www.clockworkmod.com/rommanager and scroll down to Nook Color.
  4. Nook Color image nookcolor_1_4_1_signed.zip form here or read this before.
  5. CyanogenMod version. Could be CM7 or CM9 and you may choose from:
  6. Google Apps that includes Play Store and most Google apps. Go to http://wiki.cyanogenmod.com/wiki/Latest_Version/Google_Apps and download the file appropriate for the CM version to install.

Create bootable SD Card

For Windows:

  1. Install WinImage trial version or Win32-Image-Writer, and WinRar, also a trial version.
  2. Right-click on the downloaded CWM zip file and open the image with WinRar
  3. Click the "test" button to make sure your file is good and then extract the image.
  4. Plug your micro SD card in your computer, then open WinImage and choose "Restore virtual hard disk image" from the "Disk" menu.
  5. A list of available USB drives will pop up. Choose your sd card from the list and click "OK".
  6. A browse dialog will appear, prompting you choose your extracted image. From the drop-down menu just above the open & cancel buttons, choose "All files". (You want the img files, not the original zip file you extracted it from).

For Mac:

  1. Install RAR Expander
  2. Open the CWM zip file with RAR Expander and extract the zip.
  3. Plug your SD card in your mac
  4. Open Disk Utility, select the SD card and click on the Info bottom. Note the Disk Identifier value. Example: disk02
    • You may also try with the command in Terminal:
  5. Unmounts with Disk Utility all the partitions mounted from the SD card. Do not unmounts the SD card.
    • You may also try with the command in Terminal:
  6. Open Terminal and execute the command:

For Linux:

  1. Extract the zip file with unzip command.
  2. Plug your SD card in your mac
  3. Unmounts the SD card executing the command:
  4. Copy the image executing the command:
Depending of your next step you need to copy the files you need in the SD card.

Restore Nook Color to stock

  1. Create bootable Image SD Card
  2. Plug the SD card in your computer and copy the Nook Color image. Do not unzip the file and do not copy it inside any folder just in the card itself.
  3. Remove the SD card when the finish the copy
  4. Turn off the Nook Color, insert the SD card and turn on the Nook Color.
  5. When the Clockwork recovery screen appear select “mounts and storage”
  6. Select “format /system”. Select Yes
  7. Select “format /data”. Select Yes
  8. Confirm /system and /data are not mounted. They should appear as “mount /system” and “mount /data”
  9. Push the power bottom to go back.
  10. Select “install zip from sdcard”, then select “choose zip from sdcard”.
  11. Select the Nook Color image you copied in the SD card earlier. This process will take a while and will replace /boot, /system and /media with stock.
  12. When finish will display “install from sdcard complete”. Turn off the Nook Color.
  13. Remove the SD card and turn on the Nook Color.
  14. Setup your Nook Color (Wi-Fi, B&N User, etc…). You may also format the SD card using the Nook Color or your computer.

Install CM7 or CM9 on the Nook Color

The CM9 is there to be installed on the Nook Color but due to performance issues I recommend to install CM7. In this section I’ll explain how to install one of both.

Stable builds are recommended but new versions come out every couple months or so. Nightly builds are created just about every night. They are generated from the Cyanogenmod github and the contents vary from day to day with minimal testing.

The currently night builds for CM9 are Eyeballer and Samiam33, both are good and based on the same CyanogenMod code, but often have their own tweaks and may have preliminary code not officially released.

The easy way to install CM7, CM9 or update one of both is using Rom Manager application but it cost $6 in the Play Store.
  1. Create a bootable SD card with CWM.
  2. Copy into the SD card the CM9 room you select or the CM7 room you select.
  3. Copy into the SD card the Google Apps file.
  4. Make sure the battery is more than 60% or plug it to the power during this process.
  5. Power off the NC and plug the SD card into the NC. Power it on and should boot into the Recovery screen.
  6. When the Clockwork recovery screen appear select “mounts and storage”
  7. Select “format /system”. Select Yes
  8. Select “format /cache”. Select Yes
  9. Select “format /data”. Select Yes
  10. Confirm /system and /data are not mounted. They should appear as “mount /system” and “mount /data”
  11. Push the power bottom to go back.
  12. Select “install zip from sdcard”, then select “choose zip from sdcard”.
  13. Select the CM image you copied in the SD card earlier. Select Yes. This process will take a while.
  14. When finish will display “install from sdcard complete”. 
  15. Select “choose zip from sdcard” again.
  16. Select the Google Apps file. Select Yes.
  17. When finish will display “install from sdcard complete”. 
  18. Turn off the Nook Color or press the power bottom until the “reboot system now” option is visible and select it.
  19. Remove the SD card and turn on the Nook Color if you did not choose to reboot.
  20. Setup your Nook Color (Wi-Fi, B&N User, etc…). You may also format the SD card using the Nook Color or your computer.

Sources

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