[U-Boot] environment in NAND

[Arno Steffen]

NAND is sufferered from Bad blocks and bit errors. Thats why usually
exists a bad block handling and an ECC. Am I wrong, that I miss both
on uboot  for it's environment?
Or is my uboot just to old (2010.06) and newer versions handle this?
Is there a special setting necessary to handle this?
I see that environment is CRC protected but this make things even
worse, if not an important bit is toogled.
Best regards
Arno