JFFS2 crash in linux-2.6.30

[Anders Grafström]

linux newbie wrote:
> I tried this patch, after which I am not getting crash, but instead it shows
> cp: input/output error. and this is not consistent. somtimes, file
> copying is perfect and some times its not.

You get this when you write to a dnode whose previous data resides
in a NAND block that has gone bad.

Have you set CONFIG_JFFS2_FS_WBUF_VERIFY?