newbie queries

[Ram]

Hi,
   I am using linux 2.6.19 and have a few queries regarding linux mtd.
   Im using a JFFS2 filesystem.

   Regarding bad block management - What kind of bad block management does
   mtd and jffs2 use?.

   What happens when the filesystem detects that a block is bad?.

  how does it work?.

  Am using a large page. Each page is 2048 bytes. Does this include
the 64 bytes for the ECC?

Regards,
sriram