On Wednesday 19 November 2008 08:29:29 Wagner Scott (ST-IN/ENG1.1) wrote:
> Hi all,
>
> I happened to read " ... And it seems there are lots of blocks that are
> marked bad afterwards." in a recent post, followed by Charles' comment
> that "Bad blocks are usually a result of some lower level issue with the
> device driver hosing the spare bytes."
>
> I have had intermittent problems for awhile now with yaffs (v1.27, small
> page mode) going on a spree of sequentially marking all free blocks bad.
> I have suspected that this is the result of either a lower-level device
> driver or hardware issue, but have not been able to gather much data
> because the issue is so sporadic.
>
> Can anyone give me some pointers as to where I can find more info,
> diagnostics, or work anyone has done on this type of problem in the
> past?  I would really like to track it down and fix it.

I would expect a byte palcement issue in the driver to give reasonably 
consistent/repeatable results since that would be algorithmic.

Sounds more like a driver timing/hardware issue.

-- Charles