CRC on Read-Only partition

[Artem B. Bityuckiy]

On Wed, 19 Jan 2005, Artem B. Bityuckiy wrote:

> On Tue, 18 Jan 2005, Jared Hulbert wrote:
> 
> > My understanding is that NAND technology is prone to read error even
> > if you aren't programming or eraseing it.   Such errors can occur
> > randomly.  By that I mean the data reads fine and then its bad and
> > then it reads fine...
> > 
> Hmm. Thanks. So we just need to re-read several times.
> 
Ok guys, I looked through documentation and articles and have not 
found anything which may approve this.

The question is: if we've read page and encounter ECC error, is it 
possible that if we re-read it several times we will have no errors? This 
means does NAND technology assume random occasional bit flips which go 
away after we re-read page?

I do not mean solar rays, radiation, etc. I only mean NAND technology 
itself.

Would be good to have some URL.

P.S. :
Toshiba's guide stands bit flipping is possible, but they stay until block 
is erased. Re-read as many times as yiu want - you will still have this 
bit error. But this doesn't mean block is bad - erase the block and be 
happy.


> --
> Best Regards,
> Artem B. Bityuckiy,
> St.-Petersburg, Russia.
> 
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--
Best Regards,
Artem B. Bityuckiy,
St.-Petersburg, Russia.