here is the fix:
Fix CWM 5.x Nandroid Backup
Let's just say you did what I did today, and did a backup, flashed another ROM, then tried to restore back to the nandroid you just made. Didn't work did it. Come to find out, I wasn't watching the backup, and it fails to generate an MD5 sum. I did a little searching to find out what to do, and I found the following steps (not my work...thanks goes to "desmail" for sharing this).
To fix this is assuming you did not change the folder names and let Clockworkmod create them.*
Code:Checking MD5 sums...
MD5 mismatch!
- Plug your phone to the computer
- Open a Terminal and type:
Code:adb devices
adb shell
# cd /sdcard/clockworkmod/backup/2011-06-29.20.22.53
# rm nandroid.md5 (Probably will fail - for me, the file was never there to begin with...this is fine)
# md5sum *img > nandroid.md5
# exit
****Make sure you change "2011-06-29.20.22.53" to the name of your backup folder*****
- Re-run the restore and everything should be fine.
You will most likely need the Nexus S ADB drivers to accomplish this.