JFFS2: checking CRCs twice!?

[Josh Boyer]

On Wed, 2005-01-12 at 09:21, Artem B. Bityuckiy wrote:
> On Wed, 12 Jan 2005, Steven Scholz wrote:
> 
> > 
> > >>Well. I think when a sectors gots written correctly (and summary is correct), I 
> > >>have to assume that the sector stay intact. So no need for checks.
> > >>
> > >>If a sector got broken just by reading it then the whole embedded system is 
> > >>broken and has to be replaced ...
> > > 
> > > This seems to be true for NOR. But  chrcking CRC helps at least *detect* 
> > > and *report* media problems.
> > Fair enough.
> > But how will pay attention if the system is embedded into your microwave oven or 
> > washing maschine... ;-)
> In this case this doesn't make sence.

Actually, it could make sense in a microwave oven.  They have a
mechanism to display errors to the users if they'd like by using the
clock.  It's all up to the overall design of the system.  You don't
necessarily need a human to parse through dmesg.

(And if your washing machine is sophisticated enough to need Linux, then
it probably at least had some LEDs you could flash a morse code message
with.)

josh