> > Yes, do some manual operations on an unmounted yaffs partition.
 >
 > Thanks for the help Charles
 >
 > I did this with mtd-utils and writing to the mtdblock device using dd. I
 > didn't seem to have any issues. The blocks that YAFFS2 were saying
 > couldn't be erased were erased successfully (and thus not marked bad). I
 > will test a bit more with it.

Is using dd to write to mtdblock device safer or better than using 
hacked flash_eraseall that ignores bad blocks?

Is the block size relevant in the way it writes to the underlying device 
or is it best to specify bs=2048 for a 2k NAND device?

TIA.