Tuesday, May 17, 2011

Rolling back to stock 1.1

Making a Clockwork Recovery Disk and using it to help install Nook OS 1.1

If you're reading this, you probably

- have a nook that seems completely unbootable and need to rebuild it. You want it to boot up into 1.0.1 or 1.1 because you know your AP doesn't work under 1.2 and did with the earlier OS.

- have installed the 1.2 update, don't like it, and want to roll back

- liked 1.2, but can't get your wireless to work with it.

If you are rooted, please be sure that you have made a backup of your apps with Titanium and a backup of your device with Clockwork.

To reset to stock you will need:

- a microSD card (I recommend two if you intend to roll back and then "lock" your device by rooting on 1.1)
- a copy of the 1.0.1 firmware
- a copy of the Clockwork Recovery (CWR) disk image
- a copy of the 1.1 updater
- a disk imaging tool such as diskimag (or use dd for mac/linux)
- a good zip tool - I recommend 7zip.

If you want to do a clean, sparkly install of 1.2 (rather than the update from 1.0.1 to 1.2) there is now a stock 1.2 installer available. This will make your life simpler if you want to test drive 1.2.

The CWR images are available here: http://legacyschool.us.to/nookdev/clockwork/0.7/

Download the file that matches the size of your SD card.

The 1.0.1 image are available by registering with xda-devs and reading this post


Leave this file zipped after you download it.

The 1.1 update file (BN should make this available again!) is currently available at http://www.techerrata.com/dl.php?path=14&file=Sideload_update_1-1.zip

Leave this file zipped after you download it.

Step 1: Make a bootable CWR disk.

Completely unpack the CWR file you downloaded. You must use a file whose name ends in .img. as your source for making the disk. The files I am pointing to for downloading end in .tar.gz, and are essentially "double compressed."

gz = gzip. 7Zip, an excellent cross-platform compression utility, can decompress these, leaving you with a file whose extenion is .tar

.tar = unix tape archive. 7Zip, an excellent cross-platform compression utility, can extract files from these.

Once you've unzipped and untarred the file, you should have an .img file (sized appropriately for your SD card. You will need at least a 256 M card, but I prefer to use larger cards so I can also store backups on them.)

Use an imaging program (diskimag or dd for mac or linux) to make a bootable SD card by "writing" the .img file to your SD card.

This erases all the data on that card.

After You've Made The Disk...

Copy the zipped 1.0.1 firmware file to your CWR boot disk.

Unmount it from your PC.

Power down your Nook Color, put your new disk in, and start it up.

It will boot into Clockwork Recovery, which is controlled using the volume and power buttons to go up and down in menus (volume) or back (power.) An action is chosen using the N button on your NC.

You can use CWR to make a full backup of your NC. Restoring this backup will put you back in time. If you have reregistered your device after you've made this backup, the device will reset after you boot, so don't reregister until you're sure you are happy.

You also use CWR to install the 1.0.1 zip file.

First, go to mounts and storage and format /system and /data and /cache. Do not format /boot!

Then, go to "Install Zip from SDcard. " Use the "manually select" option and install the 1.0.1 file you copied onto the card.

When it is done, power off the device and remove the card.

Power on, and you are running 1.0.1.

You can skip the "out of box experience" here. You can update to 1.1 now.

Connect your NC to your computer.

Update to 1.1:

Drop the 1.1 zipfile you downloaded from techerrata.com onto the "My Nook Color" disk on your computer.

Disconnect your NC from your computer.

When your screen goes to sleep, the update file should install.

To "lock" your device at 1.1 - in order to resolve wireless problems, or because you don't like 1.2 -- root your device now.

No comments:

Post a Comment