Dear Scott,
In message <20090617155421.gb6...@loki.buserror.net> you wrote:
> > If you want to erase an area but you want to be sure that 'size' bytes
> > were erased, you should use:
> >
> > 'nand erase off size'
>
> How would the "nand erase" command reliably distinguish between the two
> alternatives?
It cannot.
> What we could do is extend the "plus" semantics (which currently allow
> rounding the size up to a block boundary) so that if you have a plus sign
> before the size it is interpreted the same as read/write.
But it's not only with the "plus". I think erase should work similar
as write - if we allow write to skip bad blocks and "exceed" thenetto
size, then we must do the same for erase.
> I'm a little uneasy about changing the normal erase command from size to end
> -- it would break existing uses. Though, it would make it consistent with
> the NOR erase command. Perhaps a period where it warns but accepts anyway a
> size, if the second parameter is less than the first.
"if the second parameter is less than the first" ? Sorry, can't parse
that. What do you have in mind?
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de
The so-called "desktop metaphor" of today's workstations is instead
an "airplane-seat" metaphor. Anyone who has shuffled a lap full of
papers while seated between two portly passengers will recognize the
difference -- one can see only a very few things at once.
- Fred Brooks, Jr.
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