Originally Posted by otacon507
OK, so in every case the 'safe' recover is EL26 (Gingerbread). That is a different kernel than my current ROM runs. So basically, what do I need to do to nandroid backup & recover? Like I CWM failed when doing the above. Next time, are you saying that I:
EL26 CWM-->(flash kernel of ROM backup)-->(restore ROM)-->??
Yes, you can flash the Agat kernel from EL26 and then restore the CWM to restore the backup.
The Agat is a safe kernel and fine for backup & restore and flashing mods but many phones have issues with flashing entire roms with it (no need to flash a different kernel unless you are reflashing the rom) so we recommend using the older EL26 CWM or EL29 Directboot kernels just for when you're flashing JB roms. The only time you would need EL26 or EL29 is for flashing a fresh JB rom. This why you see instructions for flashing the Project X rom using EL26 or EL29 Directboot and the same applies to any custom JB rom.
Note: Of course, always follow the special flashing instructions that are provided for any custom rom.