[U-Boot] handling of bad blocks in nand

[Arno Steffen]

A short question to handling of bad blocks:
My nand shows a few bad blocks (example 100000)

What is happen when I write / read from that block via nand write / read.
Is content than ok (by mapping good blocks do that address)?

Other way around - if I have commands like

"get_kn=nand read.i 0x80000000 c0000 200000"

do I have to care for bad blocks in that range ?
Di I have to make the part bigger to have some extra blocks, if one is
skipped while write/read as it is bad?

Best regards
Arno