The issue is created by bundling the new AMI, the process is not copying the /dev. Booting the new instance Grub has the definition of root using LABEL=....
To fix:
1) edit /etc/fstab updating the LABEL=... with /dev/sda1
2) edit /boot/grub/menu.lst doing the same
3) run update-grub to rebuild the grub config
After that the new AMI bundled will boot correctly
The issue is created by bundling the new AMI, the process is not copying the /dev. Booting the new instance Grub has the definition of root using LABEL=....
To fix:
1) edit /etc/fstab updating the LABEL=... with /dev/sda1
2) edit /boot/grub/menu.lst doing the same
3) run update-grub to rebuild the grub config
After that the new AMI bundled will boot correctly